Do you think Road would benefit from having some text to prevent infinite draw when combined with Champion? Something like:
+2 Cards
Return this to your hand.
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While this is in play, you may not gain Actions (Actions, not Action cards).
(This is not in the Supply)
I appreciate your suggestion, but I'd like to keep Road as is.
Fixes to Road have been proposed a few times in the past, but up to now, I never really felt the urge to change Road. Having it be a non-supply card was LastFootnote's suggestion, and I'm glad it is, because it fixes several issues. Now the only card it seems OP with is Champion. Problem is, I hate Champion, or rather, I hate the Page line. Warrior is easily one of the worst cards in Dominion for me, and as a result, if Page and Road couldn't both be in Dominion for some reason, I know what I'd choose.
But in honesty, how bad is it that Champion/Road allows you to play an arbitrary number of Roads? It only comes up once in a blue moon, and even then, all it does is draw your deck. In a real-life game, just reveal the Road and put your deck in your hand. Faster than Scrying Pool, that's what it is. Of course there may be discard-for-benefit, and man, it's still no worse than Scrying Pool - again in one rare setup. "But what if the person just keeps playing the same Road again and again?" is a legitimate question. In most Champion/Road games, it does nothing. It's not like the game keeps me from revealing Secret Chamber endlessly until you jump over the table to kill me, so that's that.
Of course, there are theoretical setups where a player might want to play Road again and again for a benefit. Actually, I can only think of one, which requires Town, Page, Tournament and Travelling Fair. Each Road you play now generates one surplus Action, each such Action generates +1 coin, and coins also produce buys. So, if you now get a Road in hand, you can empty the supply. And then, you can reveal the Road, say "I empty the supply" and go on to the next game. Or if you insist to play it out, you draw your deck, put Road on the table until the cash you'll get from Diadem outbuys all the cards you need, and then go on to the next game. Again you could again argue that somebody might want to produce even more coins, and again, those don't achieve anything you don't have already, so it's the same thing as Secret Chamber to me. And if all stars align, you could even include an Event like Wedding, where infinite coins are infinite VP, and then the VP are what the coins are, they stop doing anything the ones you already have don't do, so it becomes pointless to keep on getting them. Again, Secret Chamber.
As a sign of my good will, I hereby promise, if this ever actually comes up in random setup, and the game actually ends on a Road exploit instead of by somebody winning before this can be set up, and that player actually insists on ammassing a surplus of more than, let's say, 1000 VP, I will compensate all people involved except that time-stealing jerk by sending them free pizza in a flavor of their choice. This offer expires October 13th, 4018.