I have read somewhere that you guys are going to shift to Bitcoin Cash as the preferred payment option now or is this just
a rumour? I hope it is just a rumour, because I am surely not going to support a platform where the merchants are only
allowed to accept one type of coin. BTC is the worlds strongest coin and I think it will be a mistake to turn your back on that.
but the transaction fees are so high
According to
this article on NewsBTC from December, BCH and a few other altcoins (Zcash and maybe LTC) will be added to OpenBazaar, but BTC won't be "dropped" from it. On their blog, they write that their long term goal is that the software, in the future, should be "coin-agnostic" (working with any cryptocurrency).
That's, in my opinion, the best way to go. For bigger payments BTC still is the most secure, accepted and convenient cryptocurrency.