I haven't posted on the forums in a while but here's my two cents:
Had the company worded things better, I think a lot of problems could've been avoided, but what's done is done. I'm glad the RoFR is out and if they wanted to implement a way to promote more publishing and out-bid potential publishers, maybe opening up a submission season would be pretty beneficial for both parties.
But as is, your IP IS important, they can say they're just running a business but so are you, NEVER forget that. Never sell yourself short. (Word of advice for anything in the future)
What I ended up doing is: I'm keeping my comic on tapas but will be updating less frequently: I used to upload every Tuesday and Thursday (just a day after my main site) but with this, I rather encourage traffic there instead. So now I'm just going to upload once a week and let the buffer expand naturally. That way, my readers (my only priority in this site at this point) will still get a comic and notifications, but if they'd like to read more, the website is available. It doesn't turn tapas into my priority anymore and that's fine with me \:I/
That being said, I'll be going over their ToS every time they change them and if anything poorly thought out happens again, I'm out.
I hope my own solution helps you out in some way or at least find a happy medium. Tapas doesn't have to be your priority and you can mirror elsewhere too.