I'd tell them and give them 3 to 6 months to bring it up to spec and deliver what was there. From their perspective, they are giving you the benefits they proba

I'd tell them and give them 3 to 6 months to bring it up to spec and deliver what was there. From their perspective, they are giving you the benefits they probably already have at the larger company that acquired you. Give them a chance to make a change as in a big company that can take a bit of time. If not, vote with your feet.