Pausanias on Achaean armament, ca. 200 BCE

[Giannis K. Hoplite]

There are almost idntical depictions in sculptures,like the one I posted,for infantry soldiers. You must have seen some in Amphipolis museum. Anyway,I do not deny the meaning "weapons" for "hopla" of course,I'm just pointing out that it had two different meanings after some point,like many modern words,too.
Wouldn't it be easier to say that he switched them to phalangites,like so many other hellenistic armies?This would emidiately mean longer spears and round (pelte) shields,instead of argolic shields. On the other hand,where there hoplite armies in the second and first centuries bc, or these were eliminated only in bodyguards and small units? And also we know that phalangites could fight in different formations,with different spear lengths. Could this imply that halangites could fight also as hoplites when needed?
Khaire
Giannis