MTP is not mature enough for prime time, and heavily favors GPUs over CPUs.
If it's true then we should expect that network of Zcoin still will be controlled by 10-15 large botnets which highly centralised on one pool
If the current lyra2z hashrate is really coming from CPU botnets (which I doubt) then this is one problem that would actually get fixed by MTP. A GPU-favoring algorithm like MTP would marginalize them.