Regeneration of SP

[Handsome Jack]

Well, maybe this could fall under the purview of 'endgame content'. For example there could be 'God Powers' like that Lifeburn thing that could only be accessed at a certain level after Tier 3 power ups.

There's a bit of precedent for this, with the power-up boosters that Omni introduced recently. It would nice to have carrots to walk towards after Lvl 12 or whatever.

The issue is that as presented, Lifeburn would be relatively useless to a high-level character. As I stated earlier, once you reach a certain level, there's no chance of you running out of SP during a single fight. It WOULD, however, help even the playing field a bit for the lower-level characters.