Keeping small max block size doesn't solve the decentralisation issue (decline in node count). At very best it only slows it down.
Correct. I never implied that it does solve it. However, an increased block size limit could only make it worse.
i think its worth noting segwit will have the same effect on node count as 2MB, it will increase requirement to nodes in more or less the same way.
and i think we can all agree maximizing node count shouldn't be a major concern, classic nodes are popping up left and right on AWS. keeping full node requirements very low, only opens the door to a sybil attack, and makes it easy to drown out the voices of real participants dependent on the system.
if anything the barrier to entry on running a full node should be raised to make it easier to hear the voice of Serious participants, participants that matter like bitpay, bitfinex, or tiger direct.