I think you are on your way to agreeing with me!

That's perhaps too optimistic, but hear me out. Now you are amending your statement to emphasize Ostfront's teamwork less and a "tactical" and "more slow approach" more, two concepts which are, you now seem to agree, not 100% fungible (because you can be a slow and "tactical" lone wolf). That's progress because that's a big part of my point, but the next step is to realize that "tactical" and "slow" are not always even equivalent, either, probably not even most of the time. Fire and movement, for example. The movement part of that
has to be fast, and the whole process benefits from efficiency rather than cautiousness. Sound tactics are
methodical to be sure, but you can't be caught being too
meticulous. But to be successfully methodical on the battlefield, you have to just get practice and experience under the belt in order to be efficient.
Efficinety doesn't demostrate realism and/or tactical combat. When I play RO2, and advance successfully on the field, and my team win because the locktimer runs out, It's not funny, because It's not realistic. When I quickaim at someone and manage to kill this player It's not funny because it's not realistic. When I am able quick bandage before the enemy kills me, it's not funny. When my skill increase It's not funny. Because it's not realistic. It's just an artificial skill. Not my own skill.
I am talking about what's fun in terms of realism and realism only. Because I don't play this game for any other reason.
RO2 is by fact more unrealistic than RO OST. Good or bad. That's why people on this board are complaining. Accessibility means that you focus the game more on entertainment than realism. And TWI made this game more accessible.
And the only way to do this is in a game like RO2 is to play under the pressure of an unforgiving battlefield...not through having tons of time to get your crap together. Thus the much-touted "learning curve" of RO in RO2 is steeper in any individual round because it is more pressurized, and thus broader over time. If you don't have a clue at the beginning of a round, you may not have time to learn the lesson before the round ends. But over rounds, matches, sessions, you'll learn. At least that's what I've experienced.
The reason why the lockdowntimer was implemented, and the reason to why it never was optional, was in order to keep the pace up. That's very obvious because that's exactly the result of it. Because that's what over 15 millions of players like. TWI didn't add the lockdowntimer because of any weird thoughts of realism, nor did they add skillpoints because it was more realistic, not did they increase the HUD because it's more realistic. It's better for newcomers and more entertaining for most people simply put. The learning curve in RO2 is not steeper than in RO OST. Because RO2 is more accessible. TWI have stated that themself. And by playing the game you notice exactly this.
I don't and couldn't deny changes. But, many of them I actually see as positives, and most of them I see as neutral to "tactics" and teamplay (if not actually helpful).
That's exactly my point. You may see them as positive because you enjoy them. But just because you enjoy them more doesn't mean they're more close to real-life. I am talking about realism. Not what I consider as fun in terms of pure action packed entertainment. If you look at battlefield for instance, they only stick to the realistic features (such as destruction) that will ENTERTAIN the masses. They don't make the bullets lethal, the don't remove the perks, they leave it all there. In Arma 2 it's the opposite. The games prio is realism over entertainment. Still you have people that argue that BF3 is one of the most realistic games when it in fact just is one of the most fun games.
So, when you play a game you enjoy forget what you enjoy. Don't ask you why you enjoy it.
Only ask yourself: Is it realistic? Then, your answer may be no, its not more realistic but I enjoy it more.. and that's perfectly fine. If you do that you will be completely unbiased. Because fun doesn't always mean that the game is more realistic.
Conclusion for this is fast reloading speed, quickaiming, skillpoints, unlocks, twitchy movements, a cover system that allows you to bounce up and down, stripped down command system, lockdowntimer, tunnel-shooter like maps, no learning curve for the weapons, protected areas, huge focus on quick reflexes and action, locked tanks which you can't exit, increased HUD details, ability to spawn at squad leader, aren't a part of the realism aspect.
Compare RO OST to arma. Make a list. Then you compare it to RO2.
Conclusion: RO2 is not more realistic than RO OST no matter how much you like it, how much fun you have in it, or anything else.