Boon traps are locations that buff or heal your friends as opposed to gimping your enemies. Arcane mark allows the trap to discern friend from foe via read magic.
I'm shocked an appalled. They might as well have rounded out the idea by having it, upon death, turn into levitating coins that slowly rotated in place. It's the cousin of the chocolate bunny and power-up mushroom!
I'd skip the bracers. You can get more mileage from mage armor. If you want to give the caster a protective item, you might want to try a 1st or 2nd caster level wand with the shield spell. Some of the gold could be spent on scrolls containing the utility spells(knock, identify, detection...
Give Nameless a Silthilar heart and a geas induced wanderlust. The apocalypse can be such a distraction to research.
Edit: I'd also be tempted to have them run into familiar NPCs who slowly reveal facts contrary to the PCs experience. It's a nice chance to use the players memories as the...
A sword & board duskblade could do worse than taking Somatic Casting from Complete Mage. Not only does it obviate any issues with channeling, but it aids in using the rest of their spell repertoire.
Nystul's magic aura the thing, stick it in the pommel of a plain ol' +1 sword and sell it on the open market. The sword is eternally passed around to henchmen, 1st level losers and others who aren't a threat.
I'm curious about how people view the Eldritch Glaive warlock invocation. From the flavor text, the author seemed to be under the impression that the warlock was a 1/2 BAB class. Is the invocation too strong(as a least) for an average BAB class?
Perhaps you could look at this as an incentive for buying a set of Tact-Tiles, or if money is tight, one of Steel Sqwire's Flip Mats. I own both, and they're great. You'll never look back!