Of course that could possibly be true, since this is a subjective matter, but at least I personally, being a multiple MTD owner, and having played and owned at least a couple Peavey basses with these pickups, couldn't imagine those SF pickups being able to do something Mike's couldn't with their range.
If it was me, I'd just use the EQ on the bass to get whatever sound and avoid putting new screw holes in bass like that.
Also, he doesn't mention the original pickups coming with the bass, so I wonder where those are.
At the end of the day, it's totally his bass, and he can do whatever the heck he wants with it, and it'll take whatever hit it'll take on resale for it, and if he's ok with that, then there's no problem of course.
It's just that it strikes me as something someone did just for the sake of tinkering, which usually has negative results all around.