As one of the main developers for FPGA's, I can say that no current FPGA's have yet been programmed with Timetravel10, and the sudden drastic increase in net hash is caused by Baikal G28's.  The Baikal X10 was unable to change the order of hash algorithms but their updated Baikal-X did have that capacity, and the G28 is just two overclocked Baikal-X.

The appearance of Baikal ASIC's on the bitcore network would be okay if this algorithm was publicly available for owners of Baikal-X or Baikal G28, but it is being held privately by Baikal mining.  In my opinion at this point it would be trivial for them to take 51% of the hash power.

I have been a huge fan of Bitcore since 2017, and mined it extensively with my GPU's.

My suggestion is that coin devs switch algorithms, I know hard forks are a huge pain, but the coin safety is in jeopardy.

In terms of which algorithm would be the best to switch to, I have a lot of input on that topic just as I have given many suggestions to the microbitcoin team; the algorithm of choice depends on what type of hardware you want on your network.  The problem with GPU friendly algorithms is that GPU mining is so unprofitable that most GPU mining is now done in big farms with low electrical costs.  Generally I recommend algorithms that support GPU's and FPGA's at similar ROI, and in some cases you can even (almost) equalize ROI on GPU/FPGA/ASIC like with the pure Gost algorithm.