Looking for advice...

I've got a US passport. 2 years left. 20 pages still good (had an additional set put in a few years back in CM).

I'm considering getting a new passport due to the large number of Cambodian visas, Thai visas, and entry stamps.

Every time I cross, the IO on both sides look a bit sideways and page back and fourth looking for the current stamp.

I want to get a METV in Los Angles this trip.

Anyone have any idea if they look at a 3/4 full and a bit tatty passport negatively when deciding to issue a new Visa?

Is it worth the money and hassle to get a clean slate?

(I do have 2 land visa on arrivals in 2018)

Thanks!