well, what else do the devs expect as responses to very broad statements and no real details about listed features? that is what we all want.....DETAILS. of course posting broad statements will get people worried. people don't want to see the game turning out crappy after waiting for so long. when people read things like "improve abilities" etc... they think of what already exists because that is all we have to go by. look at the phrase, what else could be meant by "improve abilities" other than, well, your abilities improve??
the progression system for KF works very well.......for KF that is. for a game where you are playing other real people, you can't have one person with more stamina, less recoil, more arm strength, better aim, etc.... that would ruin gameplay especially for clan wars. for clan wars a mutator could be made to have all players back on a certain default level, but how fun would that be? you'd play in public and "improve your abilities", get used to playing the game with those abilites, and then have to play on a level you aren't used to because you're being bumped up/down to balance things out.
of course, we all could be way off on what the system will be like, but hey, with no details or specifics it's leaving things open to speculation. that's all this is, speculation and there's no harm in continuing to voice our opinions on what we do and don't want the game to be like. if TW doesn't want people to worry, then release more details about features. then again, they can do what ever they want because it's their game, not ours. either way, we'll all have to wait until release day to see exactly what the game will be like anyway.