'simplistic form' is correct and can be used in written English.
You can use this phrase when referring to a simplified version of an idea or concept. For example, "The new government policy can be summed up in its most simplistic form: increase taxes on the wealthy to fund essential services."
The comfort zone is to start in simplistic form.
This movie, despite its somewhat simplistic form, acts as a fine tribute to the man, his work and the bravery of others who are called to his field.
In its most simplistic form, financial planning is the process of charting a course from where you are today to where you want to go.
For one thing, Obama does not believe in the simplistic form of American exceptionalism which insists that Americans are more talented and virtuous than everyone else, that they are blessed by a patriotic God with a special mission.
He took the "Mighty Mouse" song and the Rockettes and excavated the heroism and the joy from pop kitsch — and found humor, absurdity, and comedy in the disproportion between their simplistic form and their powerful emotions.
Given the format of the study, with a limited number of projections, the visions outlined necessarily have a simplistic form.
The most serious charge is that they attack the most simplistic forms of religious belief and leave their most intellectually subtle versions untouched.
The men's efforts frequently prove that simplistic forms of identity art continue, and also tend to get bogged down in technical finesse and craft.
A common misconception of evolution is the assumption that, over time, organisms universally evolve from simplistic forms into more complex life forms (for example, the single-celled organism becomes multicellular; monkeys gave way to apes which evolved into humans; Jakobi 2010).
In its most simplistic forms, pink has become a distraction.
In an interview with music journalist Gene Lees, Coltrane was asked of his musical and stylistic change from modal and free jazz to more simplistic forms and standards.
