I have several other builds in my collection that use rapiers or fighter splashes to fit in quicken and maximize (for example, my wife has Fanttom of the Roq Opera, a 16 bard / 2 rog / 2 ftr that is similar to this with quicken, maximize, and evasion). Would I trade it in? At this point in the game, nope. I run Roq through epic quests every night (super close to that Marilith chain with ASF rune) and I have no regrets.
Others doing similar builds may find a lot of benefit from dropping khopesh and toughness to fit in quicken and maximize, but do your best to avoid the biggest problem with most bards: being too weak at everything. Going from 520 or 500 HP to 470 or 450 HP is a big drop, and a bigger one for a bard than some of the other classes that can afford to lose a little beef. Those little dps drops are like losing tempest.
It's a self-fulfilling prophecy -- as you become less able to melee competitively, you'll spend more time overcomphensating by spending all your time healing. Not that bards can't be great healers, but those cure lights and cure moderates need a lot of help to fully keep up with classes like favored soul and cleric, even when the cleric in question is a melee, too. Roq Star caps out around 1100 SP + mysterious bauble + spell storing ring + torc, which is like an unlimited supply of displacements, hastes, rages, and buffs for the party. I do my part to help out, and I'm always there with a scroll or cure critical when needed, but I'd be a pretty crappy "healer" on this character. I like not having to hold back on the buffing.