Apart from it's not enough though. Most nations that'll attempt to go fascist or communist are minor nations. When the AI plays nations like Hungary they often fail when taking out Austria, and would be absolutely destroyed by any democratic power if they were ever brought into conflict (which they're often not as they won't get war goals against most majors and the wargoals they get generate next to no world tension).
The only nations we can look at as balances to Germany are other major nations, so let's look at the nations with reworked focus trees.
Japan- Starts facist and it's alternates (which it already often takes) either leaves it communist; where it does nothing, monarchist, which leads to a soviet war (the one I war which Germany will always be able to do) if it ever progresses the tree that far, which it often doesn't, or democratic, where it does nothing.
UK- The UK often tries to flip to a different ideology in alt history but due to the mechanics it uses it very rarely does. I don't have any metrics to measure it other than my own games which I know isn't particularly scientific, but I've played a boatload of games with historical focuses off and I'm not sure I've ever seen the UK manage to turn communist and I think I've seen them go fascist once. Because they have to do everything by event the UK basically never flips, I often quit my games around 1942/3 so the UK might almost always eventually flip, but if it isn't flipping until that late in the game you've got a serious problem and it isn't a viable substitute. The most often thing I see is the UK goes down the decolonisation focuses near immediately weakening themselves substantially and then just sits there doing nothing ideology wise. The only ideology I've seen them successfully do a few times (and they seem to take this road far less often) is monarchist, where they get an option to ally with Germany anyway, which means they'll be pretty much useless, most of their focus tree involves reclaiming their colonies and the other bit is destroying Italy, the only fascist nation left on the planet.
Furthermore the UK is one of most picked democratic nations (and I think one of the most picked in general) so if they're the only nation people are relying on to be a counterbalance then they're screwed if they're playing as the UK.
USA- Does anyone ever see the US go into civil war? I only ever see the US take the tree up to the safe still democratic point. In my 100 or so hours since MtG came out (and I only ever play with historical off) I have never seen the US go into one of their civil wars. Even if they go communist I'm fairly sure they get very little (although I can't remember), and the fascist civil war is meant to be very hard even for players, so there's very little chance of them winning even if they did go into it.
France and the Soviet Union- These trees are old and the alt history is poor. The Soviets can't turn away from communism and the French (on the rare times they go commie) do nothing but drag the SU into a war when they get attacked by Germany. I understand France is getting an update to its tree in la resistance but yknow.
Furthermore all these dlc are different and players may only have one. Paradox are most concerned with not breaking their game, and if you only have WtT for example there would be no other nation which would be able to change focuses to combat the lack of WT.
If you really want to play with Germany going democratic that badly just change it in the settings so they follow that path. I know that disables achievements and that's annoying, but game balance comes over having a nation go democratic more often.