I disagree. Just because Trouba is established and Jost is still too young to be, it doesn't mean the Avs would entertain such a move.
I remember during the lockout, when ROR signed in the KHL, I suggested we could trade him to Winnipeg for Little + Trouba (who at that time, had just been selected 9th overall the summer before) and no one suggested that was crazy...in fact, some questioned if that was a good enough return.
People need to start to pump the brakes on the Trouba hype though, the songs the indians sing about his awesomeness in the mountains are starting to reach Jeff Finger proportions.
I'll admit, I'm a big fan of Trouba's and always have been. I think he can be an excellent top-4, (probably top pairing) 2-way d-man but I don't think this guy is a franchise d-man like some to seem to think he is. At the time of his draft, I compared him to Erik Johnson and I think that's a pretty good comparable. He's not going to quarterback your PP...he's more of a 2nd unit guy on the PP and he'll show in time to be able to play big minutes and play a shut-down role. Sound familiar?
Prepare to be surprised. He may end up as 2nd line center because MacKinnon is #1 but Jost is going to make a lot of people forget about ROR.