RE: Why did Pokemon Released Tropical Beach?
Not really sure what you mean to say here. If not even the competitive players predicted predicted that Tropical Beach would be any good, then you can hardly put fault on TPC for printing it.
That said, it wound up being a very well balanced card in play. It's not particularly over-powered, but it does confer SOME advantage to the players of SOME decks over those who opt to not use it. It allows for many slower, clunkier decks to be somewhat more playable. It is and was never, by any means, a necessary card for competitive play. Most popular decks are fast enough to not really need it, and those that do make good use of it can typically do without it.
However, I still do find it unfortunate that Tropical Beach ended up having even the degree of restriction that it did. Unfortunately, TPC was stuck in a position between the people who demanded a more accessible reprint of the card, and those who complained that suck a reprint would devalue their hard-earned reward. In the end, their decision to let it rotate out of play was probably the safest compromise.
So to answer your questions, no, of course TPC didn't predict the level of play Tropical Beach would receive - no one did. They didn't do it with any knowledge that they'd be criticized for it ("heavily" is a bit of an exaggeration. There are those who are much happier for its existence). And it is "affected".