I think the escort will be just ok if you only use Cobbs Quay (gentle slope), otherwise I think it will defintely struggle on other steeper slips like Davies' Boatyard (next door, but a fair bit cheaper tho).
I've also found out the boat is a lot heavier at launch than retrieve (food, drinks, baits and fuel being used up), so as long as you get the reverse down the slip on launch, you'll probably be fine, if not, you can always unload as much tackles and stuff as you can before retrieving.