Rather late in the day (the key decision in the Senedd was made earlier this year), people are waking up to the enormous increase in the size of Wales' parliament which Labour and Plaid Cymru are set on. Conservatives have started to campaign on the increased cost of a larger assembly - and they are on firm ground in doing so. But the nature of election is at issue also. A former member of PC, and of the last commission to look at Wales' electoral system, objected on Sunday Supplement (just over 33 minutes in to this) to the reduction in democratic control inherent in the list system.
There is a summary of the various constitutional committees and commissions here.