Here is the thing. Days is filming 8 mos. in advance, despite the time off 9 weeks. Thus, we will be seeing everyone til fall. The actors not being given new contracts, could easily, by then, be asked back. Petitions are useless, in my opinion. Just as an example, when Brandon Barash (Stefan) was killed off, viewers were outraged, very obviously, it was a mistake. So the suits sought to rectify, (after the scenes were shown to public, having been filmed 8 mos earlier) and hired him back. He has filmed, we have yet to see it. And it all took a lot of time, being we don't get to see what was filmed for 8 mos., thus they don't get feedback til then, thus decision to rectify, get actor back, write story, film.........a year at least.
Don't sweat it.......takes forever,.