I wish they had better Bluetooth connectivity options, and better wireless device compatibility. My RokuTV can't find my soundbar for wireless connection which is frustrating.
The new updated homepage layout is nice looking, albeit redundant. They added a quick access panel, but you can't customize the app layout only include or exclude an app there. The old homepage app layout is still there, it's just way down towards the bottom, and really not necessary.
I also wish they would offer the ability to change/reprogram the direct app buttons on the remote (ie: Netflix, Disney+, AppleTV+, HBOMax). So we could customize them to our preferences.