OK. Here's 2 simple ideas to gain some space and functionality. Both of them combine existing pallets, and add a nice little feature.
1. Color Wheel and Color Selectors Plus
Below is a quick idea as Before and After.... and taking care of the #1 user complaint about Painter X: "The wheel is too small!" The after also includes the ability to see CMYK equivalents, which would also be able to show HSB, RGB, LAB, whatever... by choosing it from the option drop down arrow on the right, where you can now only choose Standard Colors, Small colors or show as RGB/HSB... which if truth be known... is worthless as it's now implemented. Who cares what percentage of HSB is, when the standard is using absolute numbers as in the Color Info pallet. Also, the bottom 8 colors, or possibly 10, could be a fast Favorites list, or Last 10 picked... Option-clicking on it to lock it or change it. Also notice the quick Black & White selector, similar to Photoshop's. You'll notice that After takes up the same amount of space as 2 Pallets and a drop down bar (color sets) as before.... AND adds more functionality... and it's BIGGER!

2. Basic Brush Controls
So many pallets and bars doing the same thing, or show the same thing. Here's just 2 pallets that could be integrated, Size and Angle... possibly even Spacing. Also the General pallette could and should be broken up and either added to the top bar, where the majority is already, and Method and Method subcategory could easily be added as a second context menu using Shift+Cmd (Mac) Shift+Ctl (Windows). One more pallette out of the way, and 25% more space for other pallettes. I also added a "Hardness" slider below "Minimum Size". This could be used to fine tune a nib. Better would be to save nibs so that you could easily reuse them with other tools. I will admit though, just as is, it's a heck of alot better than Photshops choices. I do realize you can use captured dabs, but again... this idea is more elegant and easier.

3. This just covered more than 50% of the complaints about Painter X.1. Now just add Live previews for adjustments, and fix the broken Blending Modes when using layers (mutiply, gel artifacts, etc.) and you have X.2 ... NOT XI (eleven)! These things could have been, and should have been changed LONG AGO.. or at lest added!
4. A note about the Brush Creator: why on earth did you go to the trouble of designing something that COULD be useful, but then basically made it a resource hog by quasi opening a complete second running Painter! Why doesn't it just plain open as a temporary document window, or similar... leaving your current Workspace as the controling interface. Or was this truthfully the beginning of making a Photoshop plug-in, or the Baby birth of Essentials? Just curious.... because the idea of a Photoshop layer plug-in is a VERY good one!... and you blew it when creating Essentials, regardless of how many awards it's received... it's WORTHLESS! Dump it, or make it useful for those people that have stated here that the would like a Painter Classic, where they can create their "Clone-RealBristle-Wedding-Portaits". No layer blending modes? Even FREE progs have that today! Sheesh!
OK... so all I wanna know is... where and when will X.2 be ready?! Consider this free consultation if you send the link to at least a Beta!