Original sentence: On more than one occasion, editorial problems or corporate pressure to modify or re-script his plotlines have prompted David to leave books, particularly his decision to leave Marvel's X-Factor, due to constantly having to constrain his plots to accommodate crossover events planned around it and other "mutant" titles (such as X-Men, X-Force, etc)
Edited sentence: On more than one occasion, editorial problems or corporate pressure to modify or re-script his plotlines have forced David to leave books, particularly his decision to leave Marvel's X-Factor, due to constantly having to constrain his plots to accommodate crossover events planned around it and other "mutant" titles (such as X-Men, X-Force, etc)