The obvious contenders for changes are anything that Yoshi did either really badly before(if something is buffed) or anything he did really well before(if something is nerfed).
Things that spring to mind for possible nerfs might be a minor weight change or a range/knockback change to uair or fair, possibly a knockback or range change to downB.
For possible buffs we should look at things he did very badly before. My first guess is that eggthrow doing 1% might have been change with a hitbox change to ensure both always connect, this would be a change welcomed by all and honestly strikes me as something that wasn't intentional in the first place so could be considered a bugfix. Then eggroll is the next contender there, following that would probably be grab range or grab lag, followed by throws.
I don't think they'd create new combos for an already good character this late in the patch process so I'm going to go ahead and guess that throw changes are placebo.
It's probably intelligent to get into the mind of the devs the last couple of months in order to take some guesses. This can be done by looking at what they've been changing in other characters. If we look across the range, top tier characters have all had weight reductions (Sonic, Rosa, Sheik, ZSS) while some mid tiers received increases. Top tiers have had some killmove nerfs(Sheik vanish) while mid tiers have had some killmove buffs (reduce lag on tink bair for example). In other areas glaring issues with range of swordies have been repaired.
So the current mindset seems to be range in the neutral, weight changes. killmove changes and there's one example of a bugfix in Wario.... So far anyway. There's a lot of characters with currently unknown possible changes.
