I personally don't like it.
Ken- is so masculine to me, that's why (well,
one of the reasons) I can't stand
McKenna /
Mackenzie and variants on little girls.
Kendra is certainly better than
McKenna but to me the -dra ending doesn't soften the name at all. Plus it seems hugely dated to the 80s and I think of that "girlfriend" of
Hugh Hefner who is super super tacky. That's not a good association to have...