It's just personal preference
I'm not saying that there is anything bad or wrong with that mechanism, it's just not my preference. I prefer the traditional plunger type inline like the TC Black Diamond has that's shown on Page 3 of this article about the Omega.
http://www.gunsandammomag.com/long_guns/tc_012505/
I'm not crazy about a swinging trigger and breech block, and I'm a little skeptical about not having to take the barrel off to get everything "clean".
Simple? In some ways yes, but in all ways? But I'd just as soon have the shorter barrel, receiver, plunger (thrust bolt) mechanism, fixed trigger and flick off safety at a lower price. But I'm not hunting in wide open spaces either, and my inline uses #11 caps which have never failed me either, are cheaper and are easier to use (with a standard capper) too.
If I really wanted an external hammer rifle, there are other inline ML mechanisms with a simple external hammer design. That may or may not affect lock time. But they do try to make it seem so simple and easy clean, when that may be an oversimplification. I've never shot with that design, so I can't say for sure with any actual experience with it.
A swinging trigger/breech design just doesn't really appeal to me personally. There are Browning CF lever action rifles that have a swinging trigger too, and they never appealed to me either. Everyone has different tastes.
I'm also curious about whether the supplied breechplug removal wrench is adequate and comfortable for "easily" removing the breechplug while the barrel is in the stock. In one picture that I saw, it looked a little bit short to get good clearance and leverage with. Not that it wouldn't work, but it's a question of comfort too.
http://www.tjgeneralstore.com/thompson.htm
.54 Lyman Cougar action: