Bitcoin has proven, that it is works fine, even through times of different attack modes (FUD, spam, patenting, +, XT, RV, CW etc). I don't think we have a pressure to raise the blocksize or to force the mass adaption. We don't need no SegWit to make Bitcoin great again, because it is already. Give this baby time to grow, folks.
The current decrease in fee could be attributed to two things.
1. Spam attack stopped.
2. If you look at the stats bitcoin transactions volume has decreased in the last few days, most probably users have started storing their funds offline because of August uncertainty.
Yeah, today bitcoin transactions are getting confirmed with a low fee, but there is always a possibility that spammers would get back to their job sooner or later to manipulate fee or just to push their propaganda and then the same high fee drama would start again.
Second thing, the whole Segwit, BIP 148, and Segwit2x has already created a lot of uncertainty in the community and everyone is getting prepared for it so stalling it further would make the situation worse.
I came to read about Schnorr signatures, maybe this can help combat spam attacks. It was never if bitcoin needs to scale, it was always when and now would be the apt time.