Tiamat-reliant junglers feel terrible right now
The major problem is that clear EXP has been shifted to krugs and razorbeaks. Jungles without AoE in their kit struggle to/cannot safely clear these before Tiamat. This is primarily an Udyr and Shaco problem.
Playing Udyr feels absolutely horrible. In games with Diamond+ players, I'm at the mercy of the enemy jungle, because I can't healthily/safely clear Krugs or Razorbeaks for level 3.
If I'm starting at blue, I have to either go blue -> gromp -> wolves -> red for level 3. The stop at wolves opens a window for the enemy jungle to steal my red. If I skip wolves and go straight to red, I have to backtrack to wolves because I can't hit level 3 in either of the top side camps without decimating my health pool.
If I'm starting at red, I can go directly from red -> blue -> gromp -> wolves, but my wolves clear is incredibly slow because I run out of mana as the gromp dies, and I don't have enough to keep my passive stacked on wolves. I can start Talisman, but I'm unhealthy when I hit level 3 without the life steal.
Also, prior to completing Tiamat, I'm left with large periods of time where I have nothing to do but clear either Krugs or Razorbeaks; after which I cannot gank, because my health and mana are decimated, and these clears are always slower than they were pre-patch, as I'm always at a lower level than I would normally be. Before these jungle changes, I would have put pressure on lanes and soaked some XP from each while I wait for wolves and gromp to respawn, but I can no longer do this because I'm at a level disadvantage to all lanes until I finish my Tiamat; and even then, I'm virtually always at a level disadvantage to top and middle lane.
As a result of these problems, my level and gold throughout the entire match are significantly reduced from what they were pre-8.10, and it makes every game feel like an uphill battle. Even when I get first blood, I still struggle to remain relevant and keep up with the solo lanes. If I don't get any early kills, I just fall off into complete irrelevance, with no way to get back into the game.
Can we please get some change to reduce the burden on jungles whose kits lack viable AoE? Even a jungle item that builds from Tiamat would be amazing, because currently, it's a 1200 gold detour (and an entire item slot, I often don't have room for wards) from core items, just to be able to do something that the vast majority of junglers get for free as part of their kits.
p.s. someone is inevitably going to comment 'lol put a point in Phoenix as Udyr, ez problem solved.' This is not viable at higher ratings and destroys your early gank potential, which is critical for Udyr's success.
with Tiamat in D II..... in jungle..... and people rage about his initial 16 second cooldowns...
even if your champ suggests starting 
and speed it up.
seems to counter Udyr now with all his buffs he didn't need to make up for ward loss.