My opinions on TE.
They're a relatively new build team when comparing to the more well known teams out there, FyreUK, Vareide etc..
And all in all they've done pretty well.
They've made a few mistakes along the way but thats expected.
Lost Ridge: Was a fantastic map! One of my favourites, however there was a problem with it and it crashed regularly, which is why it was taken down. Hopefully it'll come back soon!
Fallen Empire: What a great idea for a map! 2 corns, a deathmatch arena..
The only problem with it is it was rushed. The terraforming wasn't the best, done in less than a day..
And the buildings/structures aren't.. the most detailed in my opinion.
It could have been one of the best SG maps ever made if it hadn't been rushed.
I hope they bring out a revamped version one day.. That would be amazing.
The TE lobby: I absolutely loved that lobby. The idea, all the little secrets, the mini map room.. It was a brilliantly made lobby and in my opinion is their greatest build yet.
The Hub: I do like the hub and the structures.. My only problem is its far too big. When someone with a lower spec'd computer is forced to use only tiny render distance its very hard to tell where they're going.
It's easy to get lost on it. Yes they're signs, yes theres a compass, yes they have the jump pads..
But players prefer visual rather than signs or tools to get them from A to B.
If the bridges/paths were half the size it would improve the lobby greatly.
Without trying to advertise another server.. there is another hub out there which in my opinion works perfectly.
Its small, its simple. It may not have such grand structures as the TE Hub but it is much more effective.
I'm a designer IRL and you're always meant to follow the key rule of design. KISS.. Keep it Simple Stupid.
That's not me criticising TE, thats me offering constructive criticism.
The revamped lobby: Wow, it's amazing to see the old lobby back.. So much so that I'm always forced to type out "Team at fountain!!" Sarcastically of course.. :3
I just think I would have just preferred the original version and I don't think it needed to be revamped.
And just to correct your original post..
Khamuranah isn't a TE map and nor is Solar Frost.
Khamuranah is a map created by JoshKey on his own before TE formed and Solar Frost was made about 6 months before TE formed. The only reason they're in the credits is because they hosted it on their build servers while Echo_555, Creepy_Crawler, myself and a few others revamped it.
However we offer them many thanks for doing so 
In conclusion, TE isn't the best build team out there.. But thats an impossible claim for any team to make.
Yes they've had their mistakes but they've also achieved some pretty amazing things.
They'll continue to grow and develop their skills and I guarantee they'll create brilliant things in the future.
In the meantime I wish them all the best for the future and can't wait to see what they bring out next!