Battle compressor is more of a deck specific card. The biggest problem with the card is finding the space for it. It's just more cards to put in a deck and unless I'm playing something like Flareon or Night March, I don't think it's worth it. (though I'm debating keeping one in a Kingdra deck for a big Dragon Vortex).
VS Seeker, on the other hand, is amazing, even with Seismatoad EX in the format. Much better than Random Receiver, Pal Pad, or any of the item based draw cards. Basically, I run 10 draw supporters, 3 or 4 VS Seeker, and several 1 ofs such as Trump Card, Xerosic, Iris, Lysandre (which still might be worth playing 2). To ensure I have a draw supporter early game, I play a Jirachi EX and max ultra ball. I still get the benefits of supporters, but the one ofs allow decks to do a lot of cool things. Reusing Lysandre, playing Trump Card to ensure no card is ever gone forever, even something like Iris. Iris actually makes me less afraid of Pyroar in the bronzong Matchup. Why? Because it can enable Bronzong with a muscle band (a one prize attacker) to score a quick KO on Pyroar. The same could work for aromatisse. It's not foul proof and has a lot of holes, but it doesn't require sacreficing much consistency, and gives you a fighting chance.
Another card I'm liking more is Pokemon Fan Club. It's a good one to get early game with Jirachi and you really only need 1 or 2.