Hello,
I will forward your request to the Stardock Support Team for their review and recommendations. Please keep an eye on this thread for any updates. We really do appreciate your feedback,
But, do know that with Start11 set to Windows 10 style and with full screen turn off. You can click and drag the start menu edge to resize it to as big as you want it to be. Something like screenshot below.

Thanks
Basj,
Stardock Community Assistant.