I find them different flavors of fun.  It's a single player game, you could mod them and post it as an alternative version.  I would rather improve the mediocre professions than nerf the fun ones.

 I would love to see a nomad sov/ faction that can't settle a city and must roam until they conquer someone else's.  I thought that would be a good way to counterbalance the old Adventurer sov profession (heroes for free.)

I wish Bandit Lord let you steal caravans from other players, or tech points, or whole techs.  And let you recruit high level assassin heroes.

Besides, Beastlord depends on beasts... if you are surrounded by darklings, ignys and other non beast critters you are out of luck!

And Slavelords lets you take those bandits and ruffians, etc and convert them to pioneers.

etc

There are some 'poor' choices, but these aren't really that OP.  Wealthy runs out.

What is likely more unbalancing is getting the free archer group and the sand golem (wolf also, but it's a glass cannon).

get those free units and you don't need an army.

The deal with OP powers in a single player game is I would rather them be there than not be there.

Since it is single player and I'm not competing with people online I can always choose to not min/max and use the best combination of skills.

Balance is more fun, it makes choices interesting rather than obvious...

I think Beastlord is as powerful as Warlock (+ 50 % spell damage > should be + 25 %), Warlord (- 50 % unit wages), General (+ 25 % xp) and Armorer (+ 25 % defense). The other professions are weak and should be made stronger to give the player more options and to make AI opponents with them dangerous.

Several times I managed to snatch an Umbroth (spelling?). Well yeah. The game was practically over by that moment.

Wealthy is pretty reasonable.  You get a couple of free rushes early, which is, no doubt, really great; but it runs out rapidly.  Scholar is better over the long-term.  That said, yeah, I can't win on ridiculous or insane without it.

Beastlord really is very strong.  There aren't nearly as many "lone monster" groups, which is what really made it crazy before; but it's still strong enough that I don't use it in order to make the game more interesting.

i only played one game as a beastmaster hero and found it very fun. can be really powerful if you are lucky and get some early cavebears for damage and some spiders for crowd control. the limitiang factor is the mana cost of the tame spell and the chance of getting a resist. maybe the tamed beasts should work like summoned creatures (require mana maintenance), so by having an army of tamed critters, you also drain the resource that is required for the taming.

i don't think wealthy is too powerful. it's 500 gildar, so you can realistically rush 2-3 units or buy your hero a nice suit of leather armor and a horse, but once the cash is spent, it's gone. if you use it wisely, it can obviously give you an edge by starting the snowball effect a few turns earlier (and early turns are usually the most important turns in 4X games). but you have to spend the cash early to actually benefit from the compound effects and if you make a bad decision, you can lose the potential advantage. it's certainly a powerful boost in the hands of an experienced player, but a newbie is probably more likely to waste the cash on the wrong items and render the trait pretty useless in the process.

There is an easy solution to this problem. Just don't pick them. It's a singelplayer game....let people decide themselves how they want to play.

Isn't the beast lord and wealthy thing a trade off between early game power, and late-game stat advantages?

The other thing to consider about beastlord is its utility depends heavily on the "world" settings.  So if you're playing with extra monsters and extra wildlands and have the world difficulty set as high as possible and are using epic research speed, then yeah beastlord is pretty overpowering (though as far as I know the AI doesn't use it effectively).  But if research is faster, and the world has fewer monsters, the advantage is less overwhelming.  Honestly, if the issue is "Feature X is overpowered in situation Y and underpowered in situation Z", that sounds to me like another way of saying it's balanced already; the point of balance is not to make all things equal (at that point, there's no need to make a choice), but to make sure that every option has situations in which it's the best choice.

Yep, that is the only way that it might be OP. Resistance is bumped significantly, so it is much much tougher than it used to be.