A full rebase takes time, and even more so for a single dev with family obligations. Patience.
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on KitKat, would you mind sharing your setup? Whether you're rooted, which ROM and kernel you're using, and any mods (themes or Xposed etc) you may have... Lag and stutter can be caused by many different things.
I'm going to hope that Lollipop will fix these 'anomalies' the Great & Powerful /s Note 4 was born with. I don't uninstall apps too often and then it only happens while I hover the icons over those options. So I'm not in a rush.