I wonder if they're planning on making any changes to the base global cooldown time.
After playing through some floors that had the haste effect (bumps it down close to 2 seconds IIRC) I thought it felt pretty snappy compared to normal, and then with GL3 I was punching/kicking things at crazy speeds. Even with the increased speed I didn't feel like I had any problem using OGCD moves in fact it felt smoother compared to no haste.
I wouldn't mind it they sped things up a bit with appropriate changes to TP/MP costs and what not.
Those bars weren't bad but we literally had to download a 3rd party screen overlay and line it up with the bosses health bar so we could tell what the bosses health is at. This was so we knew when to stop pushing and at the time Garuda was some of the hardest content. If that thing wasn't lined up just right it could mean wiping and I remember Garuda was a big dps check that had to stop at 60% or it was a wipe.
They could do a better job of it now. You can already have it display the percentage at the end of the bar (which is what I have it set to) so I think it wouldn't be an issue anymore.
This is just a random idea I'm throwing out though. I don't actually expect them to change this since they probably don't see it as an issue, which it really isn't since the current HP bar fulfills its purpose. More of a visual flavour thing then UI utility.
EDIT: That floor 200 boss...