Yeah, the less the thread veers into DetectiveGAF territory, the better. Points can be proven without things getting scuzzy.
I wish people detectivegaf'd me. Because I am too lazy to look up my own old opinions on cards.
I do remember two predictions I made that were very accurate and that was webspinner and muster for battle. Had a lot of people saying I was wrong too.
I think secrets were heavily meta dependent too. Mirror Entity and counterspell used to be very powerful back then when you had combo druids around and people didn't have much to throw into your entity/counter spell other than the shredder staying in their hand. Right now? I think mirror entity is just bad and your counter spell will be trigger by some cheap spell. You'd either get some understated jade summoner, some 0 attack totem, a pirate or worse doomsayer. Not so great.
I've seen a couple people running some secret packages lately. Counterspell will always be flawed due to coin and all the other 0 mana spells. Great in some match ups and when they already spend the coin though. I almost always had an answer to mirror entity back in the day with zombie chows, doomsayers, MCT, etc..
I think what this card has going for it is all the other secret synergy cards they've added recently and are perhaps adding more of. Well, they could go overboard with more secret synergy although I would guess not likely. Probably a new secret at least.
IIRC counterspell was eventually cut for duplicate, even in tempo mage because you could often get a strong minion duplicated.