If it's any consolation I'm not that happy with my first effort with the TT yeast. I just gave it a run at a simple grist of 99% MO and 1% Choc malt.
The finish is very dry and not a lot of the malt gets picked up after an early tease.
I get similar characteristics with kirem's Case beer. There's definitely the start of an English Summer Ale but as others have experienced there's no real finish.
I'd blame the yeast.
Just looking at the difference in colour between TTL and kirem's beer tells me that if TTL is all Golden Promise the malting specs are almost certainly different from the Bairds GP, which is what I presume kirem used.
I think the TT yeast may be a bit of a challenge to get right but isn't that what this brewing game is all about?