FWIW: It never even occured to me that they might have meant removing speed limits. I had to go back and re-read it a few times to see what the beef was.

Context is important here. Sure, “drop” could mean two things, but anything other than “lowering” in this case wouldn’t make sense. IMHO, at least.

No way. When something numerical is “dropped” it usually means lowered. Especially in the form “drop numerical value”, as was this case.