prodigal fanboy: I am not following your argument exactly. First, the quote belonging to yoyofsho16. An "infinite" card pool is assumed when reviewing because if we reviewed cards based on what everybody had... Potion would become a 10/10. Infinite might be a bad word: we aren't talking illegally running 6 Gust of Wind (except in Limited where that could be an expensive option). I'll say "perfect" since having a maximum number of every card available is indeed a perfect card pool to draw from.
By the logic we should we should up a card's score because it is a more readily available but inferior version of an older "power card", then we must downgrade a card's score based on its rarity: if only one person can play it, of course it's a 1/10, right? That is how rating something based on rarity pans out.
One can try to predict a "reasonable" card pool, but Pokemon cards usually aren't "that" rare. Yes, we have had some really, really annoying rarities in the last few years, but thankfully maybe one or two cards were extremely rare but also really good, like Time Space Distortion. Even with things like Pokemon ex, Level X, etc. we can hope for tin re-releases and the like to make them more readily available. You also must remember that even if you lack a card, your opponent may have it and thus you need an accurate idea of how good it is.
If you read the thread, you would notice we have named several Gust of Wind derived cards besides Pokemon Reversal. Cards that are available to play in the Unlimited format. The best doesn't even have a "Gust" effect: Item Finder. If you're not maxing out both Gust of Wind and Item Finder and you find you need to "Gust" more often, that is the logical choice: in those matches you don't need to use Gust of Wind more than four times, you can recycle some other Trainer that is needed. If you really need it, then that is what Item Finder is for, giving you an effective eight copies of Gust of Wind.
If you need so much Bench Manipulation then look at running a Pokemon with a Pokemon Power that can do it repeatedly for free for you! Thanks to the probable bench sitters of Slowking or any of the Trainer blocking Vileplumes or even good old Chaos Gym... well those are probably why you're going through so many Gust of Wind anyway. Might as well bypass the problem all together. If I am relying on a coin flip, I'd rather risk a tech Stage 2 line for the same number of slots in the deck but as many Pokemon Reversal-like effects as I have turns!
Basically, if you need more "Gust of Wind" than four but can't justify running a Pokemon (you just need a fifth or sixth), you have the following options to consider before Pokemon Reversal:
1) Item Finder/Junk Arm
2) Double Gust
3) Poke Blower +
4) Pow! Hand Extension
In closing
You can't predict every player and their opponent's card pool, so scores have to be given based on whatever someone could have, not what they actually can easily get. That is why a "perfect" card pool is assumed.
The argument for Pokemon Reversal in particular scoring much higher than a 1/10 seems to ignore all the alternatives available to it. It isn't your second choice... it is your sixth choice for adding more Gust of Wind like cards to your deck. Only in some bizarre, hypothetical deck where you need more than four Gust of Wind, can't afford the discards for Item Finder/Junk Arm, apparently have a full Bench without free retreat costs and are unable to run Switch/Balloon Berry to still abuse Double Gust, have no room to incorporate a Pokemon with a Gust of Wind or Pokemon Reversal style Pokemon Power, don't have enough draw power to run PokeBlower+, and despite all that are still consistently remaining ahead on Prizes enough that Pow! Hand Extension won't work either...
At last you should run Pokemon Reversal. Or if you just lack any of the above options. Either way, that looks like an Unlimited rating of 1-3/10 to me. Pokemon Reversal may be a Gust of Wind "half the time" but that doesn't mean it is half as good. Would you pay even half price for something that you knew, through no external influence, would fail you half the time?