For me, the best platform right now is ftx. There are a lot of instruments to trade with. It is possible to trade both on spot and on futures with a leverage. There's also low commissions and recently introduced a TRUMP token 
I've now completely moved frombitmex to ftx
Honestly this is first time I hear about this ftx exchange. Do they have any announcement or support topic in bitcointalk? I guess most of new service providers are not giving significant importance to this forum as sometimes maintaining good trust score makes them backfire. But, without such announcement or support topic, they might be losing big number of customers as many people here are always look for new and efficient trading platform. I've now completely moved frombitmex to ftx
Availability of various trading instruments, it definitely help exchanges to grow further but that will not an exact factor on deciding the good trading platform as per my book. Let me check this platform and share a review for this community.