Had the exact same experience with Plesioth. Dude needs to chill out and stay put.Plesioth was more annoying than hard - his running animation on land is laughable, and he took one of my lives with a turning water beam (didn't expect that one). He keeps changing areas for nothing (from 10 to 11 then ten seconds later he was back in 10...I wonder why he went there in the first place...) or he keeps alternating between land and water.
He won't make it in my most loved monsters list that's for sure.
Pink Rathian, at first I was surprised of her breath attack during the bite, the wide range of her aerial tail swipe and her hovering+ instant tail swipe. Once I learned those new moves, it was sort of alright. Seeing her limping made me sigh in relief though ^^
Electric Qurupeco as I like to call him wasn't hard at all alone, I only saw him blind me a few times, which was annoying. The real problem comes from Eviljho barging in the fight (didn't have dungbombs). He scares me =(
Pink Rathian was awesome - love the new moves, love the fact that she attacks while limping... That lateral version of the poison tail swipe is pretty lethal.
E/C Peco was a bit of a pain in the ass until I broke his wing...tip...conductor...things (green sharpness 780 atk hammer was still bouncing off). But whenever he calls Jho, I set the target cam to Jho and then just constantly position Peco between us. Deviljho often takes care of a lot of the Peco damage for me.