>Looking at http://eh.net/encyclopedia/article/haupert.mlb the average price of baseball tickets has, after adjustment for inflation, not changed very much.

>What has changed is the value of the income from TV.

And as mentioned by another commenter, merchandise and so on. Even if what you're saying were true that players have a larger percentage of the overall pie that their team makes (I don't believe this for a second without a lot more analysis) that could indicate that they were under-compensated before and are now getting a fairer share. Perhaps because of unions, perhaps because of (as you mention) free agents.