So to make up for yesterdays mispost which didn't really belong in the testing section, here's some info regarding my experience with the bash and dash mechanics. All testing done in tier 3.
ENEMIES
--I have managed a number of times to stun enemies as I jump by them using bash. This is particularly potent on slow moving enemies such as lumbers/redwards, who can not turn around fast enough to pose a threat before you can off them.
--Dash is extremely useful for getting away from a group of charging greavers. These enemies are obnoxious (although perhaps outdone by gorgos).
--Both dash and bash are useful for getting behind trojans. With a final flourish or BTB, trojans really stand no chance one they're alone.
TERRAIN
--Travel is much easier over long distances with dash; if I need to backtrack quickly because I missed something it's nice to have.
--I've found numerous places during testing where I could jump over long sets of spikes without taking any damage. To put it bluntly (har har), this is broken. A mechanic should not allow me to completely disregard a floor hazard.
GLITCH?
--I saw someone posted a tip to combine the bash and dash. I played with this and found it very interesting. If this is accidental, I would urge OOO to keep it. It doesn't seem to be game breaking, and it can be useful to move towards distant enemies quickly.
DISCUSSION
I think that while dash and bash successfully bring entertaining mechanics to a fight, monster AI needs to be improved to keep things balanced. While some have suggested that invulnerability be scrapped, I do not think this is the answer. Both mechanics will suffer if invulnerable frames are lost; however, floor hazards are another story. These mechanics should be implemented such that spikes (etc.) still pose a threat to players. While I am giddy at the prospects of having a another useful tool for time attacks, if it is detrimental to team play it needs to be altered. Do I think that is the case with every puzzle I can think of off the top of my head? Nope. However, it is definitely something to think about.
The bash has about 1.5s of null frames upon completion and this is reasonable. The dash has slightly less than 1s of null frames and then a player can attack. If enemy AI improves, this is fine. If enemy AI does not get upgraded, the null frames at the end of the dash should be at least the same as the dash (see note on trojans above).
Hope this is useful, let me know your thoughts everyone.