Sorry for chainposting but here's some feedback after testing. Most importantly, I'm having a lot of fun with this change so far and it added some actual decision making and "skill" to the class, so thank you!
I did a pair of ~15 minute parses against a blue con non-humanoid that I can critical and cripple using the Round-Tiger-Flying DPS combo. In /s 2 with shaman buffs, empower, SV, werefrog, combine BP, I averaged 500-550 DPS spamming Flying Kick against this mob prior to today. The two parses today using the combo resulted in 655 and 684 DPS, so that's a decent increase. Considering how much more damage I take while using it, I would like to see a bit more of an increase, but we'll see how it goes I guess.
In both parses, I average a combo every ~15 seconds due to missing round kicks. Overall that's not too bad, but there are times where I miss several times in a row which can be a big deal if you're tanking or soloing. Out of 60 combos in the first parse, 11 took 2 round kicks to initiate and 5 took 3 round kicks. Out of 57 combos in the second parse, 9 took 2 round kicks, 5 took 3 round kicks, and 1 took 4 round kicks. It would be nice if you could change it so that combos don't require the first kick to land, or never took more than 2 attempts or something.
Other miscellaneous thoughts:
Slow Time is supposed to be a group buff I believe, but only lands on me.
Eagle Strike Combo (DD+stun) and Flying Eagle Strike Combo (Lifetap) both have 0 resist adjust and consequently get resisted a lot even against low blue cons.
The 3x Round Kick combo could possibly offer a bit more avoidance/mitigation or something. No lengthy parses on this one yet but I didn't take noticeably less damage with it running while tanking Kaesora.
Lengthening the window for each attack in a combo would be nice. In a group where mobs get pushed and moved around a bit, it's pretty common to hit an attack button right as a mob is moving which means your attack does nothing and often breaks your combo.
Also, Force of Body should really be changed to improve combos or something. It's worth less than 5 DPS per tome for me using the DPS rotation.