Health,
You mentioned that you don’t want to be judged based on the presentation of your posts. Similarly, perhaps it isn’t right to judge Rabbi Falks motives for writing a Sefer (to “sell”).
As it happens, I know Rabbi Falk, and his motives are extraordinarily pure, and not predicated on how well a Sefer might “sell”. You don’t need to necessarily believe that, because you don’t have that first-hand knowledge. By the same token though, isn’t it inappropriate to “judge up” Rabbi Falk’s motives based on the fact that he wrote this style of Sefer?
I have no helpful information to offer on the Sefer itself, which I did not read; I don’t need to read the content to know the motivation on the writing of it. At the least, let’s not judge based on personal feelings of “it’s full of Chumros in order to sell well”. This is not some anonymous blogger you are referencing; this is a known, named, Chashuv individual (the same would hold true even if the individual were not “Chashuv”).
As you wrote, “You really wouldn’t be able to judge up my [his] middos [motivations] unless you knew me [him] well!
Just a thought; if you disagree, no hard feelings here.