PikaRom losing it (Choice Band) doesn't matter that much because Electropower, and you expect to 2 hit KO things with that deck anyway. Blacephalon GX doesn't really care that much since like Ray GX it can just generate more damage through more energy.
If the meta gets stuffed with Stage 1 and Basic GXs then by all means Reshizard doesn't lose any actual power since 230 can cleanly OHKO all Stage 1s and Basics. But if Tag Teams rule the meta, Reshizard suffers without Choice Band being able to OHKO a good portion of them.
I would argue that loosing Choice Band also matters for Pikachu and Zekrom since it becomes harder to reach one hit knock outs with the GX attack. On the other hand, the last line on the relevance of Choice Band nicely sums up my argument. Provided that Cherish Ball is our only universal search engine I would assume that Tag Team decks make up a larger share of the meta. Some types such as Psychic, Dragon, Electric, and Grass also have the benefit of additional search cards which makes them more consistent.