SegWit doesn't look like is going to get activated any time soon, some Chinese miners have gone the BU way and possibly more will switch, but I hope not.
What other options are there for SegWit to be activated? Can the way to activate it be changed at this stage? Or what other possible way is there?
There's UASF, but most of the developers and miners don't think that UASF is safe. As of now, there are no other plans to get segwit activated. I think that it is possible for the timeout date to be pushed back once we get close to it, but so far no proposal for that has been made yet. I highly doubt that the activation threshold will be lowered.