Gearbox posted some details about that level cap increase update coming to Borderlands 2 next week on April 2 (which also includes a new New Game Plus mode). Details include the usual bug fixes, storage upgrades (including for Eridium), new relics, the return of the Pearlescent tier of weapons, and YES FINALLY another upgrade level for all ammo types.
https://kotaku.com/borderlands-2s-level-cap-will-go-up-to-61-on-april-2-5992134
