It's certainly interesting... to see them actually acknowledge it's existence with more than a "we don't know when this ride will be available" type response. I don't know what sort of updates they actually mean though, unless it has become part of the TLC program and we could see it mentioned there soon... who knows!
It was always to be expected that ST would reopen at some point. There was a tweet earlier this year when the 2017 ride line up was revealed saying that they hope to reopen ST at some point in the future. I'll try find it.
I personally feel like, for how old the ride was, how much work would they possibly of had to do to it? It was a fairly new attraction. Of course the main part would be from cost cuts and the amount of people it took to operate the ride.
I think TLC is a bit far fetched, but I could be completely wrong
In all fairness it doesn't require alot of actors in the finale aslong as the scares are well implemented, With MT having made Alien:Escape they could quite easily place some damn scary figures in that space, have a few more jump effects etc and it could really safe SubTerra :