I have never had any problem with hitting the roof in terms of infamy until the 1600's. The main problems in early game is lack of safe targets to declare on (especially if start as a minor with no foreign cores).
Well here monarchy got better chances due to PU's. Also any monarchy can become the HRE, and because so, it means another gain here.
It's not that relevant. We are comparing government systems and not comparing Switzerland with say.. France.
Well actualy it is because goverment is not only a thing of what, but where, and when.
PU's only come out big in later game when you are in a good position to force PU on larger countries. Otherwise, the potential benefits of early boundary disputes is too good to pass up on.
Also, nobody said one should stick with republic forever. For instance, I went Noble Republic -> Absolute Monarchy in some of my games.
Actualy PU's are easier to aquire early on when there are lot of empty thrones, and early PU is just better as it gives you chance for earlier inhertance. Also boundary dispute are completly random (you might get none despite having 9 diplo ruler for whole game, or get 50(ok not realy) of them each year somehow) while you are almost guaranteed to be able to gain few PU's right from the start if you focus on them(because you can claim the thrones).
TGH is not that hard to deal with if you are a larger country, especially if they are also at war with others. I've dealt with them and the Timurids countless times when I pulled early invasions on Anatolia.
Easy if you are turkey which got quite good units, but not realy as western/eastern countries which unless extreme cirtumstances, got little chances with GH. And GH i starts at war with:
Muscowy which is weak and will give up quickly.
Georgia which is surrounded by 3 hordes.
Genoa which got 4 provinces, 2 of them bordering, and got no chances fighting it.
Poland-Lithuania, which does not have army big enough to kill them off - and as lithuania is AI, when player is poland, it means AI will just kill off it's armies and poland if it is AI will just be derp, and if player, it will just peace out.
So at best hungary, will border poland, and moldavia, at worst, it will border GH, and be THE ONLY country fighting it. Or there will be also OE, but as AI just lose as OE, we may just ignore it.
Yes, ask around and see who actually sticks close to their infamy limit most of the time. I don't, except for the scramble for China/India right before 1650.
Well sometimes you just need to gain infamy, for example to not let someone else to take your things. Or to form russia in 1414.