The "problem" with the new set-aside wording is, now duration cards are played every second turn, which is hard to remember.
It's hard to remember because knowing when to clean up and when not to clean up a Duration is hard to remember. It's not Prince who does that.
Anyhow, Donald's feedback on this approach was that you get "only half of what you paid for". I can definitely see the point of this, but on the other hand many durations are pretty good anyhow. Outpost, one of the worst, would be played after each of your regular turns, even. It's not like it breaks the game - not being able to Scheme a Feast didn't cause a riot either.
Also, what i just noticed: If you actually could play Durations, you could also Prince Tactician. Contrary to what i said before (in another thread, i think), that wouldn't mean you start every turn with no cards in hand. Instead, if you play durations every turn, you could resolve the Princed one first and then the effect from last turn, starting every turn with 5 cards, 2 actions and 2 buys. Or if you played it every second turn, you would pass one turn, then play a double turn next time. Then pass, and so on.
Also, when answering to Jeebus before, i forgot to mention i allready pointed out the need to tie the play and set-aside together:
I was coming from the german version of the card (which lacks a bit in clarity anyhow), but i'll try an english version that works as i meant:
"You may set this aside. If you do, set aside an Action card from your hand costing up to 4. At the start of each of your turns, if that Action is set aside, play it, setting it aside again when you discard it from play."
I got my answer though. Thanks, Donald.