I consider multitasking a discrete part of the OS, not Liquid Glass. i do have some thoughts on it though
for what it's worth there are gestures they don't tell you that make the multitasking so much easier: toggle maximization by tapping the top of the window, and then as they mention you can snap it to either side by smashing the window in a direction
also they added back drag and drop to Split View in iPadOS 26.2. after three months they finally have a stable release of this multitasking thing
I have found multitasking useful especially with stage manager, but I completely understand those who don’t like it and just want an option to restore the old multitasking. I also miss Quick Notes (workaround through a shortcut button just isn’t the same)