Enc 1 vs 3 is no real difference to Heavy Infantry - fights need to Last for a long, long, time for encumbrance on infantry to be important. Morale 15 vs 10, on the other hand, is an enormous difference. 15 is what the countries with highest morale get for their best (usually sacred) troops. If the Limper infantry only cost twice as much as regular heavy infantry in gold, they are probably underpriced.
(Well, I may have misunderstood you, but from your description it
sounded as if your Limper Infantry would be about as strong as Ulm Guardians and with about the same movement allowance, but with higher morale and possibly higher magic resistance - while costing approximately the same.)
Anyhow, looking forwards to what you come up with.
