What do you hate so much about TW?
I've covered this so much.
Basically the fundamentals of a 'launcher' are sound enough. BUT.
1) Application drawer icon on the far right
2) The fact that I can't drag and drop icons to create folders - I have to drag them up to 'create folder' before I can do that.
3) Settings menu is a rather cluttered and overly convoluted mess
4) Dialer - legacy app that belongs back in 2008 and it shows. Horrible cartoony people, big blocky numbers etc. Simple operations like swipe to contacts / favourites are not supported. Even the phone icon itself is hideous.
5) Messaging application - is simply hideous. There is nothing about it from a design perspective that belongs in a modern handset. Every element from the messaging list to actual message conversations themselves are poorly designed. The basic customisation does little to improve it in any meaningful way.
6) Cube scroll effect - on Touchwiz launcher the fact I can't turn off the inverted cube spin effect when going between screens - and in general animations as a whole on the device are as procrastinating as those on iOS7. (at least your able to turn them off in developer options).
7) Icons on the note 3 feel small in comparison to the hideous choice of stock font that Samsung saddle the device with. Either let us make the fonts smaller to match icons (changing font size in settings changes size in applications but not on home screen) or add another row of icons on a bigger device or allow the icons to be made bigger.
8) The myriad of useless services that most of us end up disabling. Applications and services like ChatOn or TripAdvisor
9) Other older legacy apps such as Clock which lack any visual flair and look outdated
10) contrasted by newer Apps like S-Health which has a nice GUI - but then the issues come in the actual app itself. Having compared its results to Jawbone UP and Fitbit Flex & Force the app itself is utterly useless at tracking things correctly. It over credits you for any kind of exercise thereby getting the very basic fundamental wrong.
11) Redundant apps - do I really need Google Play Music / Samsung Music and Samsung HUB (with its own music launcher) on my device - the fact that many applications you can not disable without root access - and as soon as you even think of rooting you have voided your warranty as it would trip Knox
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So yeah basically almost everything from an aesthetic element just feels wrong. There is ZERO consistency throughout the entire Touchwiz experience from its launcher to its stock apps and it's newer app additions.
Contrast that with Sense 5 & 5.5 (which ok folks may not like) but every element of that skin and its stock applications 'work together' and have a design consistency, much like iOS and its GUI and stock apps.
Samsung have created a Frankenstien's monster of a skin with very little 'sewing' other than the artificial kind on the back of the Note 3's back plate holding it all together.
Samsung need to do exactly what HTC did. Go back to the drawing board and create a new touchwiz with 'new foundations'. Most of Touchwiz's issues such as excessive use of ram and performance hiccups here and there are simply because of the new baggage being piled on top of older stuff.
Forget heart rate monitor that 5% of users will likely ever use - give Touchwiz a bang up to date make over. Strip it back. Remove the unnecessary. Make the whole thing feel coherent and uniform. Give users back the RAM it steals and then 100% of Touchwiz users will get something out of it - rather than the few who make use of a half working hacked on addition.