The only complaint I can really level against Frakes and Sirtis in this episode is... well the years haven't been kind to them and it's hard for them to sell themselves as season 7 Troi and Riker ten years after the fact, especially Riker. That's not their fault at all, people get older after all.
Attacking them personally as if this train wreck of an episode is their fault is petty at best. Poor form there. If you want to assign blame, assign it to the ones who thought it would be a great idea to end Enterprise on a TNG crossover... Rick Berman and Brannon Braga.
The best thing I can say about TATV... is it was nice to see Troi and Riker, even if it was a reminder that the glory days of Trek were gone and will never be again. This might have made an interesting episode mid season in some fashion maybe.... but to make it the finale? The finale should've been a celebration of Enterprise's four years... not having a couple TNG guest stars steal the show, quite literally.