They used 2TE more than anyone else but it wasn't the entire offense. Back then, they had the advantage of defenses automatically playing base in response to 2TE, now they usually mostly use nickel, so the obvious passing advantage isn't there anymore.
I like 2TE looks a lot and hope we do plenty of it, I just don't think paying 2 high priced TEs is a smart strategy at the moment, when nobody has ever found a way to build a whole offense out of it, so one or other of your expensive players will be on the sidelines too often..
If Monken does design something great this year, I'd be all for paying Likely.