TigerVNC works well, though the new rebuild-ma.sh script needs a slight modification. Rebuild-ma.sh looks for a file called 'xecutah.sh' in a webos-internals app top level directory. Xterm has this file, the chroots do not. My simpleton fix is to place a blank file 'xecutah.sh' in all the xserver apps top level directory, then run the script.
Not the best fix, but it places the chroots on the xecutah app list when running the new rebuild-ma.sh.