Bad. Reserving effective FA for specialists is the main point on the change - the better shooter you are, the more fire you can reliably put on target.
Orks are supposed to be lousy shots who waste a ton of ammo effectively shooting the air with reckless abandon and ultimately killing their mark with the sheer overwhelming volume of fire, so it's totally working as intended. What you might want to check out is the "give 'em sum dakka" Talent from Rogue Trader which lets an Ork use Suppressive Fire as Half Action.
Well honest, but why is this not the same for Semi-Auto under the rules, as thats basically my major change to Autofire? Or why does my version not allow better shooter to more reliably get more hits, with either fire mode? If anything, this makes Autofire a good chance for untrained shooters get a single hit, and dedicated shooter multiple hits, while those professionals might often go for the more controllable SA fire and thus get more hits.
This is somewhat supported in the old fluff, where SA was more of a limited fully automatic short burst (think M16), than simply squeezing the trigger multiple times. RL professionals also often fire very short bursts when using automatic fire, despite not having a burst limit. Firing 10 rounds are usually not necessary against a single target, and is likely to give too much recoil to reliably hit the last shots anyway.
And orc with BS 19, using a shoota at short range has an effective BS 39. He needs to roll 19 or lower to get 2 hits... thus he will be ineffectually spraying about. An elite stormtrooper with BS 45 will on the other hand get more hits on the target, and will probably take advantage of an aim action to improve that even more.
Suppressive fire can be effective, but an ork boy cannot hit anyone with it, so it only works in conjunction with... single shots. Which really should not be the ork way.
My main concern with this is that SA might get superiority anyway even for the skilled shooters, as getting enough DoS to get even 5 hits is almost impossible.
I really like the changes, but I think they might have gone a bit too far on the Autofire mode. As pointed out, it now seems to work well for those with very high BS, or at PB range, but not for grunts, ork boys etc.
In fact during my first session I noticed that Ork Shoota Boys have no mechanical reason to fire full auto at all, as their poor BS means that they can't hit with more than one DoS anyway. So much for "more dakka."
This used to be my opinion, but then I started to think that "more dakka" could better be represented by loads of Suppressive Fire.
Suppressive fire doesn't hit much at all - penalty exceeds BS skill.
Now if you want to enable FA to hit more, thus justifying firing 10 rounds, it might be possible to spread the hits more:
Every 2 DoS hits the target, but the every ODD DoS beyond the first will hit an adjacent target (bystander, enemy, comrade, cover etc.) instead of the original target.
Example: Bob the dreaded heavy with BS 42 fires his heavy stubber on an ork 50 meters away running towards him. He has stabilization from comrade, and uses an aim action before firing his 8 round FA burst. His adjusted BS is 72, and he rolls a 22 (6 DoS). The first round hits the target, as does the 3rd and 5th. The 2nd, 4th and 6th hits the ork buddies that are running beside the target, while the last 2 bullets miss the targets completely. If he had rolled 02 he would have gotten a 4th hit on the original target and only missed a single round from the burst.
Basically, this is quite similar to every DoS being a hit, except the gunner doesn't have full control on how to assign the hits and can hit empty space or random people and objects.
Compare this to the same guy facing a single enemy officer with only a Lasgun. He aims and fires SA at short range, giving 62 effective BS. He needs to roll only 42 or less to get 3 hits, while if he had used some FA weapon most of the hits would be wasted on thin air, even if the chance of landing a single hit would be greater.
OK, longer post that I thought, but answer me this please: Would this make FA the only good choice again, or would being able to land 3 shots at the same target and having only 10% less bonus than Autofire be enough to justify Semi-Auto burst? I certainly want to keep FA an option and not the end-all. Try to keep an open mind, I will do the same. (remember, an open mind is an invitation to heresy, and with great corruption comes great power).