Basically nothing. There may be a few more viable sets for a few of those Pokemon, but nothing I can think of that would really change their usage. Your example for instance isn't a very good one. If you are going to be using Venusaur in the sun anyway you might as well just use solar beam anyway, unless you want a mixed set or something.
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Feraligatr may become a potent sweeper Serperior might get some attention Venusaur would have a slightly better movepool Typhlosion would have minimally more utility Emboar would OHKO one thing and then die
that's all i can think of
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