I would think it would be VERY detrimental to "change" cards after they are printed. If you changed it and then reprinted the same card you would have 2 different versions of the same card floating around.
I agree. This is the major problem with errata or balance adjustments in physical games. Once the game is printed, it's generally too late to make changes. It's just a limit of the medium. It's like watercolor. Once it's on the paper, you have to live with it one way or the other.
Honestly there is a way around ANY card or combo. So once something exists that "seems" overpowered, really it isn't OP it just means it is something you have to deal with and there is almost always a way to deal with it.
For example if I see a "temple build" combo starting I usually let Hand of Bim go and when the Temple of Light hits I just toss all my resources on that for a turn (or 2 if I have to) and bam the "combo" is no longer a combo and nutrilized. Hurl a boulder at the temple, it gets +2 vs conjurations and there are other attacks like that, or if not running that toss a couple big creatures at it.
This... this is wrong. Games are not auto-magically balanced. Game balance is difficult and always imperfect. If Temple of Light was always an automatic 3 for 1 in mana and cards it would probably be too good. You're right that there's probably always a tactical way to overcome a temple, but if all of the tactical solutions would have an exceptional strategic cost then the card may still be too powerful.
I mean, surely you agree that it would be possible to print a gamebreakingly bad card? Take the temple of light and start subtracting mana cost and adding stun range and armor and whatever else. Sooner or later the card is too good, right? Eventually?
So I would DEFINITELY not reprint/change ANY card, There is NO card that is "too good". Just find a way around it or in the next expansion come up with a 'new' card that can be used against it.
There are three claims that can be made against nerfing Temple of Light.
1. No card can ever be too powerful. This is obviously wrong. It sounds more like dogma than argument.
2. Temple of light isn't yet shown to be too powerful. I'm happy to give this one more time. No single tournament is the metagame.
3. There are other, better, ways to adjust the metagame.
If something has to be done about Temple of Light or Hand of Bim-Shalla, I do think that there are better options than power level eratta. Tournament ban of problem cards + balanced reprint with name change+ low cost redemption of banned cards + new base set, for example.
Or, as an even better option, a metagame adjustment. Right now, the Priestess has several abilities that don't care about range or line of sight. This was probably supposed to be one of her subthemes. Unfortunately, it may be a bit too powerful. We'll see. If it is, I think this is the area that should have some hate cards printed.