>>96324433
>fun for you and for your opponent
>sumfin which can do good but not too gud
I think it's a nice sportsmanly list for 500pts, but possibly a little under-optimised in that you're taking a few units with drawbacks without taking many of the units that compensate. Plus if you're planning to expand it to a larger force, I'd consider a couple of things...

Firstly, what are the goblin mob intended to do. Imo they're pretty outclassed by night goblins which are not impetuous and can also take fanatics. Common goblins do have an extra point of leadership over night goblins so arguably would be a better tarpit, but they're not great at that, plus I don't think that makes up for the loss of control (impetuous) and loss of deterrent (no fanatics).
That being said, I am a respecter of the common goblin aesthetic so do have a unit of them in my army for fun.

Second, the arrer boyz... As anon says, having a unit of orc boyz with free bows is a nice bump in versatility, but a bit situational if you ask me. And especially if you're just taking 7 of them, I would question how useful they'll be. For their points you're not far off a goblin bolt thrower, or a cheap goblin character to babysit your troll.

Which brings us to the troll - I think that's a fun choice, but it's almost 10% of your points and the stupid rules could see it out of action for multiple turns. Hence babysitting.

And lastly as anon says, the orc unit looks good, but potentially a bit low on numbers. However at 500 points I don't think it's drastically low numbers.

So yeah I think you could help yourself out by concentrating your units a bit more, maybe swapping for night goblins, babysitting the troll etc, all of which I think would make for a more balanced time for you (between things going wrong and things going right) and still not be at all cheesy for your opponent. And then you have a decent base to expand from too.