I'll withhold judgement of the jungle rebalancing until this whole thing is out of PBE. There's no way it can stay as is. Quite a bit of weird shit.
Some general thoughts:
1.) Krug-Red Buff-Wolves-Blue Buff will net you level 4 and typically takes about 20s than the Live 6 camp level 4 clear. Following up on that, Krug-Raptors-Wolves-Gromp will get to 6 with a similar time savings.
2.) 2-buff level 3 clears are safer and the speed at which junglers can hit level 3 is faster than on Live by about 15s. I'm not sure this is something Riot wants.
3.) It'll be interesting to see how leashes get incorporated. Does bot help take the big Krug low and let the jungler clean-up? Does red get leashed by bot and mid lane for 3-camp clears? Interesting stuff.
4.) Raptors can potentially fuck you up. Single target, AA, AoE champ? Doesn't matter. Stay the hell away at until level 3, minimum. The only champions that can deal with them early on are AoE rockstars like Skarner.
5.) Plants are cool. Once they hit Live people will calm their shit. Riot really picked a bad video to show how the blast cone works. 95% of the time it's used it'll be to hop over your own terrain.
6.) Haven't found any junglers yet that perform significantly better or worse when doing clears than now, except one: Ivern. He's way better at clearing camps than on Live. Sejuani is iffy, but to be honest I haven't played her on Live in a while, I don't know if it's actually all that worse. Rule of thumb, however your jungler of choice clears initially on Live, they'll do just about the same in S7. Same goes for way off-meta junglers like Tahm Kench and Sion.
7.) I'm a touch worried about mana regen in the jungle. Riot did an ok job at accounting for the lost of effective health when Krug, Gromp, and Red buff smites were removed, but you can really feel the loss of no longer having a on-smite mana from blue buff on mana heavy junglers like Gragas and Graves.
