I agree completely with the OP. The one skill that takes a long time to develop is hip shooting with the bolt, but I've been doing quite well with that as of lately. Obviously, if you've got that down, you can pwn even SMGs in close quarters.
The ONLY disadvantage the bolt has is in CQB where, if you're facing multiple opponents, you're generally screwed (though I get lucky sometimes), so when I'm playing bolt (which is a lot), I try to stick to the outside.
That said, I play as a very agressive rifleman, but not by going all rambo with it (like an SMG player might). I just check the area I'm going to advance into, clear it of any hunkered down enemy soldiers (this is quite easy to do and doesn't take me much more than 1-2 shots per enemy soldier as I've gotten very good at long range shots with the bolt thanks to its impeccable accuracy, a feat that can't be replicated by using a semi-auto).
Being able to hit moving targets at medium-long ranges takes a little while to learn too, but once you get it down you can hit the target at LEAST 90% of the time. It's just a matter of learning how much to lead the target at different distances and speeds, whether he's sprinting or walking (and hopefully he won't be zig-zagging which makes it a lot harder)
The bolt action rifle is studly. It hardly sways at all (compared to the semi-auto which does significantly, which means it takes longer to line up the sites), and is deadly accurate. Especially on maps like Kyuokovo, I rack up ridiculous amounts of kills, all while moving up and getting in the cap zones.