My main worry of things is not achievements and things like that. (as long as for clanplay things can be put on an even level for all players)
It would be map design and weapon balancing.
Like a lot of people like danzig maps and push maps, but another yet maybe smaller group likes freedom in maps and cap options. The ability to win a map by surprising the enemy, rather than just fighting better.
The main thing that i didnt like from going from mod to retail, was more channeling of players to be closer together, and the amount of filling in streets. Like a thrown on the side truck or sandbag barricade or a stack of wood every few meters. Creating a feeling for me of missing open areas in a lot of the stock maps.
Another thing i didnt like was that smgs and pistols having a form of spread that is really wide (especially with a pistol) together with a high amount of recoil (even though some parameters have been the same in the mod).
Or the difference in schrapnel from grenades.
For this i hope that like cod something like a harcore mode would be there. Even though stock it would be more realistic than cod's version already, there are always those that want it more. The added accuracy to the mg's is one of my most beloved changes in ro.
Other things in ost that i loved being implemented were leaning, prone diving, bolting, and resting. (although i'm not liking the amount of sway when not rested
). I was always a big supporter of adding in smoke grenades (although i think that the amount of smokes going off in 1 round are overkill). And as maps go odessa while looking unrealistic to many, gameplay wise it is a real beauty.
For myself konings was exactly the opposite, its great looking and a good map and i learned to appreciate it, but i came in to that map expecting gameplay like berlin (which i still to this day think had the best gameplay of all maps, and im not saying this out of nostalgy as i only started ro with 2.0).
Ro is at this point still my favourite game ever, and i have not found any game to replace it yet since i started playing with 2.0. But i would be lying if there werent some things replaced gameplay wise that were core reasons of me loving the game (like the pre 3.0 cap system) and its not like im a guy that doesnt like changes, although loads of things could have been options.
Most of the guys of which i know that they played the mod (the few that are left) are sceptical, because of some changes in the past that (and most could have easily been server options rather than forced gameplay options).
I know you guys work really hard, but please dont forget about some of the original fans, even though they like the game slightly different. The sole reason that people are so worried to the point of being uptight about things, is because they really care for this title. Which can and should be considered as one of the biggest compliments.