For the most part I agree. I usually invade right after a gank simply because I expect to get invaded (I play tanks so it happens fairly often). Before I would always find the 2 camps ready to be taken (or at least one) since the respawn times were shorter. Now is pretty hard to find the camps available which is rather sad, specially since I can't clear krugs until I have cinderhulk (since it takes the time that 2 camps would take to clear it)
Vi has been doing great due to the indirect buffs. She can clear single target (thanks to her W) and AoE (thanks to her E) so she ahs more XP and gold, plus her shields means that she losses very little HP which allows her to invade on par with shyvanna while having way more ganking potential than her. Lee has similar indirect buffs that in conjunction with his direct buff makes him really hard to play against (since there is very little you can do to outplay him).
I never understood why riot suddenly wanted camps to do more damage than they used to do. I mean is teh only role that actively take considerable damage from their gold income, if it is so laners don't steal every camp just make it that you take reduced damage from camps if you have the jungle item which is already restricted to having smite, people woudl get out of the jungle more if they were close to a decent amount of HP after they got their gold.