There are limits on the benefit of computer literacy for the trader shop...and hardly any credits are generated from selling pearls and monster parts.
No one would "level" a trader just to use a portable GMI, it would make more sense to simply log an alt who is next to a GMI, check the prices, and then move on. Given level 1 froobs can use market terminals, your point hits some major issues. Also, weren't the portable market terminals introduced before the GMI was introduced, and therefore having access to "player shops" which no longer exist is the issue?
No one would "level" a crat just to use a portable bank, afterall, how can you make use of a portable bank terminal on a character if the crat is on the same account or in a totally different location? At this point is it not easier to simply find a bank terminal and deposit items there?
Introduction of unlimited F-grids for all professions would be stupid, but I believe they are temporary items intended for players who need quick access to something like a tower war (not entirely supportive of this myself though). The grid warping items which players can freely use are not functional in-combat, and are therefore not equivalent to fixer tools.
Heckler juice is like $60 or more...
Most of these additions are actually band-aid fixes for playability issues which should be corrected anyways. Players should not have to run back through 10 empty floors of a mission, they should be able to leave once they beat the boss, instead we have out-of-combat grid warping items.