Leveling Content - "companion's role shouldn't matter" - please take a look at the Bounty Hunter class quest in which the player has to win the grand melee to be a part of the Great Hunt. There are 4 strong opponents versus the player. I couldn't do it post-patch with a healing Mako. Tried again with her set on tank and barely scraped by. Maybe my results are not typical but this is something for you to consider. Heroic 2 Missions - seems balanced pretty well, I breezed through the Hutta ones with Mako tanking and myself as an Arsenal Merc. They are starter planet ones so I expected them to not be too hard. On the next planet Dromund Kaas they were a little harder but just required more care about target priority and being prepared. On Makeb with my level 58 (capped at 56) Jedi Guardian, Vigilance discipline, with full Fractured Pummeler's MK-2 gear (rating 148), and healing Kira at influence level 24, I managed to solo a Heroic but found it a challenge and I had to run away from a couple fights where a patrolling elite wandered in. As it was my first time ever in that mission I am satisfied with that level of challenge. I don't remember the name of it but it's the one where you have to broadcast false orders, then beat up fallen Jedi, assassins, and finally Mandalorians.