I find it a bit of turn off to having a Lite version and a Full version together is a bit of a hassle because I would always have to edit for a Lite list and not really use the full one, which in turn for the creator of this bank (You), it would make recording the full version obsolete. So I would recommend using the full reclist, to record all your pitches on.
Now, if you're worried about overloading UTAU and it not working, this will happen when you've put too many lines in the otoing; which the number of lines that is its limit is 32768. Now if you're worried about not having the ability to record more pitches using the full reclist, look at it this way you were able to record one, that's the hard part; now you have the experience so you can record 2 more pitches.
So to sum up my answer to your question in simple terms, either use the full reclist for all the pitches or make it single pitch, it's up to you.