This is a serious problem with Dawn Of War 1 and its expansions. The patches re-balance everything and I dont care for it. For Space Marines you can only have one each of terminators and assault terminators. Same with powerful vehicles. They changed the population points each vehicle uses so now some weaker ones cant be built in mass numbers.
For Tau the kick ass broadside battle team has been reduced from 3 units to 1 unit. Thats not much of a team.
And my games are on Steam so theres no way to undo the patches. Not cool.
Anyone else had gameplay altered with a patch to the point they didnt like playing as much?
Somewhat, indeed, it does change the status of the game. What I do remember the most is from Dark Crusade, because right now I play Soulstorm a lot with the unofficial patch (which applies after the official ones) and the Dawn of Skirmish A.I mod (for which I've been a tester since Winter Assault). In Dark Crusade, at first (if I recall correctly that was during its first few months after release) the medium/heavy vehicles/units cap limit was high enough that with the Space Marines one could build I believe either 4 or 5 Predators (and of course have them all at the same time on the battlefield), with the Tau we could get around 6 or 7 Krootox (and they were over-powered on top of that), and so on for all races.
Eventually they patched and re-balanced a good number of things, and the unit cap of two was imposed for specific unit types, such as Predators and the Krootox (can only have two of them at any given time). But on the other hand the Eldar's Wraithlord still isn't limited by that to this day, we can still build six of them, and if you control a Relic and train an Avatar your unit cap increases and allows you to build up to NINE Wraithlords (if of course no other vehicles than that are built), can you imagine not one but nine Warithlords moving towards your base. Instead they could have simply increased the efficiency and power of the Wraithlord for instance and then limit it to two or maybe four units at the very most.
There were a few inconsistencies over time with their patches, but overall I think it's still fun, I still prefer DoW1 over DoW2, I play it the most in skirmishes mostly, sometimes I go on-line with Dark Crusade because Soulstorm is pretty much dead (and so is DC as well to some extent but it's still a bit active especially during the week-ends). But your main question you've asked, about not playing a given game and not liking it as much because game-play was so much altered over time... I'm not sure, to be honest I've never really thought about it and I think it's usually fine, but if I do think about it right now there's a single title that comes in mind, and I can't recall any video game I've ever played in my life that was changed so much with updates after its release, and it's Team Fortress 2, although I still like it very much, it's certainly very, very, extremely different than what it was not only at release, but still much different than what it was even just a year ago.