Hi Matt,
yeah you do get floating tips for them and I have no doubt that in the right hands they would be fine but here are my concerns (without having tried them);
I imagine that a very long floating tip would be required to give enough anchor weight / tension against which to form the D loop (also assuming that the fly we are using is of negligible weight). This would reduce the advantage of having a short amount of line to push into the D loop.
This lighter leader set up will travel away from your intended anchor point with the flow relatively unhindered which means altering the timing used on the traditional slow skagit cast (to what you might use with your existing heads).
Although I said that a correctly delivered cast will land with minimal fuss, everything is relative and I'd be happier with a more sympathetic set up in shallower water.
I used my skagit to fish right down under the Kintore bridge which consisted of a snapped backcast and immediate pick up / delivery all conducted in a close to 30 degree plane which was quite impressive for me but against the conventional casting timing, so at the end of the day it's just a shooting head and if the user has a range of casts available and the ability to alter the stroke/ timing then anything's possible. I doubt I'll be altering from my standard head system when the season progresses.
Good luck either way, if you want a cast give me a shout.
Iain