Well, I think I would have gotten bored of keeping missiles all of the time in DS. Powerups work differently in different games I guess. That is, keeping powerups time limited keeps them fresh and keeps the player on the lookout for some edge over the enemy. The only thing I would have wanted to keep were the laser upgrades in DS, damn it was lame when you respawned during the boss-fight only to spawn without any powerful laser and any extra upgrades as well.

Anyways, I will wait for the demo to sample your upgrade setup.