Again, if it was me, which it isn't, I would have pushed to the union to legally challenge the removal when it happened. So, no, I would not be accepting the deal until a result was determined.
Litigation on the withdrawal of ST could easily run for several years.
Perhaps the reason why Unite has not instigated legal action is because it has already blown millions of its members' money of fruitless court cases (failing to get an injunction to block the crewing changes, losing at the High Court on the crew complements case)?
As suggested elsewhere the best hope for the full reinstatement of ST in the future is to accept a deal now, and hope that ST can be put back on the agenda when this has died down and there has been a period of "good behaviour" by BASSA.