I haven't really been keeping up, but is there any reason at all to having size be a thing for PCs at all any more?Good riddance to bad rubbish with the size-based lockout.
Punishing species choice with less weapon options was just terrible.
We did away with species based ability modifiers, we've almost entirely done away with small creatures moving slower, now there's no restrictions on small species using heavy weapons, there's never been any penalties to grappling or shoving like in previous editions. Being small seems entirely like a positive now. You get everything a medium species does, except you can ride Medium creatures (a big deal for Drakewardens etc) and you can squeeze through smaller gaps.