The presence or absence of a lanyard hole does not change my opinion of a knife.
BUT.
Heat Treating outfits like a lanyard hole, because it gives them something to hang the knife by when it goes into the furnace.
The way I see it, it's a statement of your courtesy and professionalism as a maker to make things easier for the other people involved in the process. So, since this obliges you to drill a hole anyway, why not also allow the end user the option?
Personally, I find it hard to understand how the presence or absence of a hole in the pommel could make or break a knife design. But it may be that I'm a clod, who looks more at the blade shape and ergonomics than the overall "flow" of the design.