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Great post CieZ.
I agree with all the issues/suggestions that you discussed except for the Flamer vs Green Cover issue; I think flamers having bonus damage vs Green Cover isn't a bad mechanic and should be there.
Everything else you mentioned though, is spot on. Most of these issues are what have made some of my games in the last few weeks un-enjoyable. I feel that ISG/Pack are still OP and game breaking (Pack especially) post-patch, mostly because the main issues with them i.e. Accuracy and Suppression weren't addressed. In a game I played on Kharkov yesterday,a single Pack Howie placed safely behind the front-line, would effectively wipe 2 models from my Gren Squads in the first hit. The so-called manual aim nerf isn't a nerf at all, especially on maps like Kharkov which are narrow; you can just aim it in one direction and have it peck away at your units from a long way off. It doesn't require skill or micro imo.