My Sifu has said that if all we wanted was to learn to fight quickly, he could teach us that in the space of a year and it would include no forms.
Agree with you 100% there.
When I was 11, my brother in law taught me an open hand form Bagua Chuan and a staff form Pi Shou Gan. One time I got into a fight and I didn't know how to use information out of my form. After my brother in law found out that I was interested in fighting, he stopped teaching me any more forms. He asked me to do "1 step 3 punches" for the next 3 years.
After that 3 years of 1 step 3 punches training, when I joined in my senior high school long fist class, I could beat up most of my long fist brothers in sparring by using my 1 step 3 punches training experience. Every time when I punched, it was always 3 punches toward my opponent's face from all different direction. My favor 1 step 3 punches are right jab, left cross, right hook, and right jab, left hook, right hook.
If you plan a 10 years program for your students, all teaching methods will be equal and be able to reach to the same goal.
The OP is interested in how to train WC fighters within 12-18 months. IMO, in order to achieve that goal, form training can be postponed. Students should spend all their training time in sparring, sparring, and still sparring.
I do believe a WC student can develop this skill within 18 months.