Thankfully, WarpOS is optional. There are 68k Games that use W3D and you can use either quarktex or Wazp3D for it. Which are W3D to OpenGL wrapper. Dunno if can be ported to GL/ES. BTW In WinUAE When Wazp3D/any W3D to OpenGL wrapper is used with PPC. It doesn't work Just gives me a ramlib error. So it's possible. No need for PPC emulation.I think Warp3D requires emulation of a PowerPC CPU. This is not available in UAE4ARM and there is no plan to implement/port this (at least I have no plan to do this).
As i remember uae4all2 & uae4arm require neon support. That mean minimal requirements is ARMv7 CPU (not ARMv6).2. An ARMv6 CPU is required. I'm too lazy to to all the coding for older ARM cores, because we don't need it for the Pandora and it will take some time.
I am using ClassicWB Full which uses Scalos and the 3.1 ROM. Hard Drive is standard and formatted FFS. It works fine if I turn off JIT.I have no problems using HDFs or virtual drives.
What kind of HDF you are using (rdb or standard) and which AmigaOS version you are using?