The genius I see here is Okrand’s ability to come up with affixes as versatile as these. As quickly as he threw the language together, there aren’t a lot of obvious gaps that should have been filled by affixes he didn’t come up with in the very first edition of the Klingon Dictionary. More than anything else about the language, that’s the thing I find awe inspiring.
Well, not all the affixes are versatile. I don't think -beH has been used in canon since the example sentences in TKD. The selection of affixes works just fine as it is, but there are tons of ways that the language could have gone differently. There are concepts that some languages include as affixes but Klingon doesn't, which it expresses through other means.
I think the elegance and versatility of Klingon have less to do with the initial design itself, but more to do with the fact that Okrand has been willing to work on it for thirty years to flesh it out. wa' vatlhwI' pIlpu'ghach HutmaH Hut vatlhwI' SuynIj je yugh wIgh mojpu'ghach.