Re: There still isn’t enough xp
BioWare never actually claimed that you'd be able to reach max level in a single playthrough.
They said that they removed the first-playthrough cap and that they rebalanced experience gain in the later parts of the game to let you reach a higher level than you could in the original.
Some outlets misinterpreted and reported that you could reach max level in a single run, but I haven't yet found any official quote actually claiming that (not that one doesn't exist somewhere).
And they changed the starting bonuses in ME2 so that you get the maximum bonus from Level 56+, so there's really no benefit beyond a few extra talent points to reaching Level 60.