Yeah I like them, they are good enough, but you totally have to play them efficiently. Just 4 heroes and no exploration bonus is a big handicap. I've always had at least one orc player in my group, and they don't perform that good. But is most times people like to start with the troll, and that's really tricky to pull off. It's OK tho, trolls are fun.
It's a very chaotic list, with nice stats and variety, but not reliable at all. Very orcish.
IMO if you want an efficient and reliable list, give a crossbow to the boss and bows to the big'uns, you are wasting that T4 for CC, but you get some reliable shooters and ensure you will have at least 3 exploration dice if you flee. Buy 2 naked gobbos to serve as expendable meat-wall and support, then fill the rest of the band with 8 orc boyz with clubs and throw them to CC ASAP with the shaman support, with their T4 and Ld7 they hold by their own pretty well. You will start with 14 warriors, some shooting and strong CC, that should let you some tactics freedom, perform pretty well during the first matches and have no problems to buy replacements while upgrading equipment. With heroes, if you get skills, make them crossbow marksmen, if you get good stats, make them CC specialists. With henchmen, make 4 groups of 2 to get better chances of lad's got talent. If you are playing a short campaign, consider starting with pit fighter or warlock.
Every time I've seen that kind of list, it performed quite well.
In my group we allow orcs club/hammer access, and big'uns to choose either shooting skills access or having S4.