Playing v20 hotfix, watching a lets play of v21 experimental 4? I think.
v20 has much higher TU costs for firing and movement.
Laser rifle has 20/30/40 in v20, 20/24/28 in v21. Movement costs 4 in v20, 3 in v21.
So I'm basically paying a lot more TU to get the same things done. There's probably a lot more changes between the two, but...
I would rather continue having to spend a lot of TU rather than be forced to spend TU%. You see, I have a squad decked out in wolf armor right now and I play missions by running them forward a couple tiles, keeping 60 out of 80-100 TU reserved. Now I don't know how much TU% a semi aimed rifle shot will cost, but I think I won't be able to move 5-10 tiles anymore and still have enough TU left for two shots. So... what was changed to promote mobility... instead kills it off. Equipping heavier armor is no longer a choice as it turns into a no-brainer (do you want to move 1-2 tiles more, or half the damage you receive if you get shot?). Keeping soldiers alive isn't nearly as important anymore - just carry a load of stun gas grenades, they'll do the trick.
Calculations are harder on the player as well, I think - I don't use the reserve thing because it just doesn't give me the proper control. Right now it's easy to remember 20/30/40, and remembering 20/24/28 is easy as well. I don't want to remember how many points I need for each soldier - because I'm bound to screw up and lose a soldier - because of interface/mechanics issue, not player fault.
Thanks for explaining that the option is configurable - that way we can agree to disagree. I personally already modified the way fuel works in air combat - 200x is just sad as certain things just don't make sense - flying in a straight line without performing any combat maneuvers burning 200x fuel, what? Foxtrot runs are simple - go up to target, let missiles fly, go back to base. But upon reaching the target, you run out of fuel. What's more - you lose a bunch of fuel at the end of each mission (cause of the delay), blah blah blah I could probably rant about that all day... but it is how the game was designed. But I can change it to 20x and be happy and play the game I want to play - and have hours and hours of fun! So that's cool. In the worst case I'll have to edit some more config files.