So what is exactly the percentage of Core Devs that work for Blockstream?
(I guess this should be the key issue here)
While I agree that it certainly is an issue (and a HUGE issue - conflict of interest), the real issue here, in my opinion, is at it's most basic:
Whether or not we should adopt a 2MB block size increase ASAP, or not - and good, logical reasons to support each side.
I think what would be the correct thing to do is: let the network decides. I.e., you put out you 2MB-supporting client, wait for everyone to convert, and if you have almost everyone on board before you deadline, activate it, otherwise, call off the plan, as of now, Wang Chun's proposal in bitcoin-core-dev channel, which seems to be liked by Matt Corallo, is closest to that.
One of my biggest problems with Bitcoin Classic is they want to go full throttle ahead as long as they have 75% of miners support, no matter what.