The problem is multipools because they shoot down the price with their huge sales vertcoins for Bitcoins. Because lyra2 should have closed code. Otherwise, will again appear shitcoins with the copied lyra2 algorithm. This would again lead to a problem with multipools and less price. If there lyra2 multipools resistant, vertcoins price will rise a lot. Vertcoin has a great future, we just need enough faith, work, patience and wisdom.
Lyra2 is already open source. Source for both Lyra and Lyra2 are here:
http://lyra-kdf.net/
If you think your alt-coin dev is actually writing new encryption algorithms, then you don't know that much about alt-coin devs. Shit, it's not like even Satoshi had anything to do with sha256. I'm pretty sure no coin dev ever, anywhere has ever put together their own algorithm for a coin.
Not really, no, and to be honest I hope they don't try. Do you think Darkcoin could have achieved it's current popularity/price if the dev tried to keep x11 closed source? I think it's (in part) because of all the x11 clones that drk became so popular. Did scrypt clones kill litecoin?
I don't think multipools are really a problem. They exist to mine and dump, which helps spread coins around, and it will be done by individual miners if it is really that profitable. There are no multipools for Monero or Boolberry or other CryptoNote coins, but I think there are plenty of professional miners mining and dumping, because they are the most profitable coins to mine at the moment.