I used to really look forward to both Toyhax sticker sets and DNA upgrade kits, but these days, both of their sets for most TFs seem to be bloated, irrelevant and overpriced. I think they both need to have a long look at themselves and start releasing smaller sets more in-tune with "essential" features fans want.
In fact, I think both companies should sell such sets together. I would love it if I could buy the types of "PayPal only" kits sold at TFSafari, plus a few stickers to give extra details for around 20-40 dollars (depending on the amount of wanted items in the set).
What I don't want toys are mummified in stickers, complete with leg-fillers, massive, unwieldy weapons the original toy/character never had, a hardly noticeable increase in height, screw hole covers and extra characters that are being sold by Hasbro anyway. Just give me the bloody weapons and features and paint/sticker details the original toy had and be five with it.