Miners should spread Zcoin hashrates out to different pools in order to avoid 51% replay attacks due to dominant hashrates on one large pool
We are aware of about 20-30% hashrate on some unaccounted pools.
I am waiting for new products in the second quarter of 2018 (the end of the second quarter as you said). No need to be hurry to release products soon, because those products should be tested carefully before releasing to find and fix all bugs.
Regardless of this, MTP is now an absolute priority and coding is well underway. We will post updates as soon as they are available and a more accurate timeframe can be estimated but tentatively should be by the end of Q2 2018 and hence we won't be doing a another transition algorithm since it's not that far off.