Replying to Let's talk about Dynamic Range, Low-light performance, action sports, and Sony Cameras

Ok, so I have a few questions and honestly would just appreciate some discussion from people who are better photographers than me and have experience with any of these cameras. First, for reference, my current setup:

-Canon 7d (og, not II)
-Ronkinon 6.5mm fish
-Tokina 11-16
-Sigma 18-200
-Canon 70-200 F4 L, non IS

80% photo, 20% video

-15% Fish
-50% 11-16
-20% 18-200
-15% 70-200

Subjects
-%50 Skiing (and skiing landscapes)
-%25 Mountain biking (crappy light in deep woods)
-%20 Misc (landscape, climbing, portraits, random fun stuff)


I love the 7d for skiing, and for everything else too honestly but I feel like I might finally be pushing its limits a little and want to upgrade.

Things I like about it:

-8FPS
-Indestructible
-I have lenses for it

Things I don't like:
-Not so hot in low light (shooting MTB has reminded me of this)
-Lots of noise at high ISO
-Not so much Dynamic Range as I would like to have (I think)
-Big and Heavy (touring with this and a few lenses is not the best)

Recently Sony's A7 Line has caught my eye. Reasonably solid low light performance, Full Frame, lighter, smaller, fancy autofocus stuff, the works.


Cons (as I see them, tell me if I missed some)
-only 5fps on the A7 (probably the one I would get unless someone convinces me otherwise)
-Slow startup time (probably not that big of a deal)
-Limited lenses, would have to adapt mine or sell them and get Sony lenses.
-Not a DSLR

Pros:
-Higher resolution (yeah, I don't really care though)
-Better Low Light
-Better Dynamic Range (I think?)
-Full Frame
-Not a DSLR

A7 vs A7II

Is it worth it to go with the A7II? looks like better AF, better IS, and a faster startup time, none of which seem mega huge to me but if anyone has hands on time with both and wants to weigh in...


Or am I on totally the wrong track and I should be looking at another DSLR? Any and all advice and experience would be much appreciated.

Thanks!