Just play GT:NH for half a year and no pack will ever seem tedious to you again.
Out of the three I only played the original E2:E, I liked it, but stopped playing at late midgame/early endgame (I set up some automation for extended craftings pedestal thing and then stopped). Expert packs all seem to get tedious at some point. But so do kitchen sink packs.
I guess I'm saying: Just play a new pack. There are soooooo many packs to play out there.