Does anyone else think that animal companions are less attractive in epic campaigns than others with fewer build points, and therefore the classes that have them don't scale up? I'm obviously thinking of the animal companion as a "shard" of the character. The power relationship between characters and animal companions gets skewed.
I assume you're talking about epic point buy, as in the number of points you have to build your character's ability scores, and you're not talking about epic-level campaigns where characters are above 20th level.
As for ability scores, the difference between those few extra points on the Epic build is minimal. I doubt it will have any real impact on the relative power level between the druid and his companion - the animal will be just exactly as effective as in any non-epic game, but the druid will be more effective, which is exactly what seems natural to expect.