I wouldn't worry about the in between racing for WPM.
Looking at DRF he had a fairly successful festival, certainly consistent if nothing else.
Day 1:
Race 1: 5th, 7th, 8th, PU, U - 5th placed horse beaten just over 6 lengths, can't account for the unseated horse either.
Race 2: 4th - A fair distance behind, but Apples Jade beat them all by a fair distance in fairness.
Race 3: 5th - Suspected handicap plot for Cheltenham too, never nearer, now favourite for the Coral Cup. Also 13th & 18th (this one coming off a layoff).
Race 4: 5th - Mt. Leinster, who had been well held in previous races anyway, so no shock.
Race 5: 1st - Min, 4/9f expected.
Race 6: F - Voix Du Reve, looking like a place was booked when coming down.
Race 7: No runner.
Day 2:
Race 1: 2nd & 12th - 2nd horse beaten just 2 lengths
Race 2: 4th - Tiger Tap Tap, many commented he was impeded in getting a run, still wasn't beaten far and had form with winning horse previous run.
Race 3: 1st & 2nd - Enough said
Race 4: 2nd & 7th - 2nd horse beaten just a neck
Race 5: No Runner.
Race 6: 1st - Bellshill 2/1 2nd fav.
Race 7: 2nd & 4th - Beaten 3 3/4 lengths & 10 lengths respectively
Race 8: 4th & 7th - 4th horse beaten 5 1/2 lengths.
Now I've made notes about WPM targeting certain days of festivals, and was written off by some, but day 2 was somewhat more consistent than day 1 by a fair way. Overall though it was a solid, consistent festival for him, and seeing as their are 4 major festivals to target this season it is no surprise his best results will likely come at these than in midweek/minor racing.
For DRF he ended up with the following stats:
Runners: 24
Wins: 3 (12.50%)
Places: 4 (16.67%)
Wins/Places combined: 7 (29.17%)
Fallers/Unseats: 2
PU's: 1
Overall, for the first major festival of the season I don't think it was a bad return, from a betting perspective it would have been, but as a trainers point of view it was pretty consistent IMO. It was a competitive festival, where only Gordon Elliott beat WPM in number of winners with 4.