I know this started as a "open regen for tanks" thread, which I agree would be fun, but I'd like to give my opinions on improving regen as a whole. Disclaimer: I'm not a numbers guy or an expert, I'm going by the "feels."
1. I would add in more -regen resistance. Fast healing has some, but its doesn't seem high enough.
2. To me, burnout is an essential power on regen due to the long recharge of MoG and IH (I'm ok with this as a click but i wouldnt be upset if it was a toggle). If the duration of MoG was increased (slightly) or the recharge time of one or both (IH/MoG) were reduced (slightly) it would go a long way for playablity and make burnout less of a essential power.
3. Stalker only - I would add some endurance recovery to fast healing due to the loss of quick recovery
4. Self rez - function like sentinel version