Current Script mechanism implemented in Bitcoin has some problems and flaws. Upgrading it could enable enormous innovations in the future.
https://bitcointalk.org/index.php?topic=490829.0
At the moment, peercoin has a relatively less marketcap and smaller community compared with bitcoin. So, it is more easier for us to have consensus to have a protocol upgrade or hard fork. How about take the advantage to upgrade script in peercoin. With no doubt, this would give us a remarkable leading position in the competition.