I definitely agree bards could use a turn from some upgrades, particularly lvl's 17-19. Without that bard capstone I wouldn't make anything but a warchanter and at level 14 I've got a better inspire courage to a point where I would be considering my multi options and whether I want the level 15 song or a couple lvl 6 spells.
There isn't anything special for most warchanters after that.
With the capstone and +1 to inspire courage at lvl 20 I think I would be crazy not to take it with a spellsinger and end up with whatever for a couple of spells taken in that time. Not much from lvl 17-19.
With a virt (which I do not play so this part is theory) I can't see making a melee oriented virt with the cutoff at anything but 20 otherwise the character will max out inspire courage at +6/+6 and there not being much for melee up to lvl 20. A virt looking at more spell support is also looking at needing that capstone too.
The polish I would be looking for is the tier 3 PRE at lvl 18 and some more spell options that are available at higher levels.
Improved blink (i want my incorporeal miss chance), cacophonic shield, city stride, improvisation, and unfettered heroism have potential to be adapted to DDO for some bonuses. Improvisation would need some work, and unfettered heroism would need a lot of liberal decision making on the intended result. Improved blink, cacophonic shield, and city stride should be easy to implement.
Body harmonics, dirge, eyebite, mass dominate person, the shadow conjuration/summoning lines would be nice to add. I might even be happy with the unluck spell![]()