I've got all the top-notch drivers (except for the most recent) and as many have already mentioned, there is no significant difference from one to another in terms of distance and even forgiveness so you're not missing anything unless the speed of swing meter really matters to you. In my case as a mobile player, I don't ding often no matter which swing meter speed (varying from 3.5 to 4.5) I play with so it's virtually insignificant for me.
But I do understand why you're frustrated or irritated by this. Psychological aspects play a huge role in golf, both real and virtual. Don't let those negative feelings affect and dominate your game, though. Once again, you are not missing anything and the driver in your hand right now is as good as the L103 driver.
FYI, WGT usually releases new products before US open every year and it's about time. With a little bit of patience, you will probably witness a new L103 hammer soon. I know... If I were the decision-maker at WGT, I would have removed and replaced the old ones with the new at the same time.. but this is WGT and they do things differently more often than not. :-/
Good luck and happy hitting!