I do not find the Shield's grip front area (frontstrap) uncomfortable. In fact, I find the Shield to be by far the most ergonomic of all the current single-stack 9mm sub-compact offerings (Ruger LC9, Glock 43, SA XDS-9, Kel-Tec PF-9, even my beloved SIG P-938). Frankly, unless one has abnormally tiny hands, it would seem unlikely to me that any American male would find the grip of any current production single-stack 9mm semi-auto sub-compact to be "comfortable."
This is why some of us prefer to carry full-size pistols that we know we can shoot well rather than sacrifice effectiveness for more comfortable concealed carry.