So what do you suggest?
Millions of $ redesigning and retrofitting a new radalt system to the entire 737NG fleet?Or reminding pilots that when they are not getting the thrust they need from the autothrottle, they may switch it off and apply thrust manually?
No redesign of the RA. Yet.
So far, this occurrence is unique and most probably fulfils the "acceptable failure risk" criteria.
Air transport is still a very safe form of travel. This nowadays tends to be forgotten whenever someone dents an airplane.
If the number of occurrences becomes excessive, then consider a redesign, or at least a revision of the certification criteria - for example, as actually happened some years ago for birdstrike protection.
In my opinion, the issue that has occurred too many times recently is allowing the aircraft to lose safe flying speed for
any reason. This accident and Buffalo are recent fatal examples. I still suggest the solution in post
#1234 as a cost effective technical measure, if any such is implemented. It should in any case be slightly more cost effective than redesigning and retrofitting radalts, IMHO.