It seems I might be a little late to this thread but here's my opinion anyhow. With this new karma system I believe that it devalues the importance of not killing innocents because it used to give you -20 karma which counted towards your total karma. With the current system it gives me a feeling of "Oh, I just killed an innocent. Eh, Whatever it'll reset next map anyways" and there is no negative association with it. Also with the current karma system, like ZZL said doesn't feel like there's any progression to the game mode at all. Back when I used to play TTT a lot I didn't play for the !shop points, I played for the karma leaderboards. Although the main problem back in those days was that the karma leader boards didn't really reset at all, I think I got up to something like 20k karma in 6 months? I think this might have of deterred new players from competing in the karma leaderboards because the players in !ktop had such a head-start on them. If you guys do decide to revert back to the old karma system I think that karma leaderboards should reset each month and provide an incentive to be #1 on !ktop at the end of the month. Maybe a skin that you can only equip by being #1 on ktop at the end of the month or something like that? In any case I think that going back to the old karma system would be beneficial to the server to promote proper play (not killing innocents) and to increase competitiveness on the server via karma leaderboards.
-Thanks for reading.