As we know Palemasters are capable of swaying or persuading undead beings to follow them / do their biddings etc. without directly dominating the undead.
Despite this unique power we are stuck with basic Neverwinter Summon Undead abilities and necromancy spells.
I would like to suggest that Palemasters at a certain level should be able to choose an Undead companion much like Animal Companions. As Palemaster dives deep into the deathless arts so shall their undead companion gain strength with them.
On another note, I believe that selectable undead companions should change depending on Palemaster's alignment.
I do feel that addition like this can strengthen the roleplay of a Palemaster, to some extent.