Actually, I am not concerning about high LA races. There are LA +1 to +2 warrior type races such as Centaur, Goliath, Half-Ogre, Catfolk and such. They have +4 or more on str or dex and have some additional abilities, too. Drow and Gnoll are indeed on the weaker side.
And, I think the very concept of optional rule is wrong because, as I described in the first post, that is in LOWER LEVEL games which LA +x race suffers much. Not in HIGHER LEVEL games. In lower level games, difference in HD by 1 or 2 does effects much. But at higher level, it does not harm much.
Try to play a 1st-level Half-Ogre fighter as a member of 3rd-level party. You offensive ability may be even greater than that human L3 Fighter. But you are still a 1HD character and thus have appropriately low hp total and saves. You will likely to die by, say, CR 3 traps which usually does not kill a 3rd-level frontline fighter. And there are many spells with HD caps in low-to med level, and you will likely to be the only applicable target from time to time.
But when you are a 18th-level Half-Ogre Fighter and your friend is a normal Human 20th-level fighter. You will not likely to suffer much from that small difference in the number of HD. And your total HP is coming closer to it's of 20th-level human fighter thanks to your high con. And of course, in regard to attack power, you are stronger.
So, IMHO, gradually removing the burden of LA will just make the +X LA race unnecessary stronger at higher level campaign, while does not save them at low-to med level campaign.