Hi mate, welcome to the forum, few points, I am personally not a fan of the stickers, but then again, I dont like many brands stickers, I think they are a boring shape, with boring colours, they are too blocky for my liking, one ida could be changing white to silver, and maybe making the blue a bit deeper?, now dont get me wrong, this current design could appeal to people, (step forward Mr FattusCattus) but I much prefer classier stickers, I.E. Aldred, DS and Salix.
onto the bat profiles you have mentioned, I think that you should include a higher middled bat, as you have all bases except this one covered, maybe have one mid middle, one mid-high and one mid-low?