Clearly several people did consider it. I quoted a few secondary sources in a previous post https://www.alternatehistory.com/discussion/showthread.php?p=2620226#post2620226 and I can add that the initial IJA plan was written by Lieutenant-Colonel Nishiura Susumu (from "The Origins of the Second World War in Asia and the Pacific" by Akira Iriye, page 102 which quotes Daihonei Rikugumbu, 2: 42,48).
The point is that OTL, the IJN was happy to lose the advantage of surprise in the PI by attacking Pearl. I am not suggesting ignoring the PI, just not attacking first. Move aircraft to Formosa and make plans to attack Clark, keep enough ships available to deal with the 3 cruisers of the Asiatic Fleet and prepare for an invasion if war comes. However, the US cannot send anything in less than weeks, so watch US politics and see if war is coming.
Note that you are quoting an Army plan here.. I'm sure the IJN would just have clapped in glee and gone along with it....!!
Army are well known for making wonderful plans without actually having any idea about the naval side of it...
Basically, the Japanese navy was as fixated on their concept of the decisive battle as the Allied air forces were on strategic bombing (and about as rationally...)
Even PH was intended to work towards this - it would weaken the USN to a point where they could be lured into battle at better odds (the original plan was to lure them west and use attrition to bring the odds more in Japanese favour, but as time went on this looked less likely to result in the USN losses needed).
And you dont get and win a decisive battle by sticking your navy out at the end of a long supply line with your major foes fleet and bases sitting alongside it...not unless you can COVER that supply line, which the Japanese couldnt.