One time at a Bible study(wt book study) I mentioned that I'll be 'happy in paradise' to be free of mosquitoes and WEEDS - I'd just weeded our garden and was itchy and disgusted. One elderly sister corrected me - "Jehovah created them for a PURPOSE and declared everything 'good'". That dampened my view of paradise. Nevermind how the ground was supposed to be 'cursed' after Eden...
The op mentioned that mosquitoes, ticks and leeches drink blood, but what about disease? Well, except for leeches - they actually can be used medically I think. 'finally awake' is probably on the right track - we really don't understand the delicate balances of the interdependencies of species.
I don't know, 'comotose'. I'm sad and happy at the same time to say: I just don't know.