If the SSPX adopts a hybrid mass of any sort, I'll presumably be long gone by then.  My priest says I'll be racing behind him to the exit, but I'm not so sure.  Thus far, most SSPX priests have NOT YET absolutely had to positively compromise, but if the slide continues, especially if it slips very slowly, I can definitely see it happening.  It is extremely important for the faithful to KNOW WHAT IS THE CATHOLIC FAITH.  Read up.  Study.  Watch and pray.  Ask questions and keep asking until satisfactory answers are given.  Keep the Faith with Charity.