I'll say no, just because i actually want thoses alts to be usefull later. Leveling an alt is longer than leveling a main whose higher generation, yet you can't even trade.
For me, alts are like my main's family, so i want them to be able to "evolve" just like the main one. Skip the fun, as is intended, is for new players mainly, and then for casual ones. If you allow this, what will prevent people from creating 10 more alts all lv30 and different build ? It will definitely ruin the game.