I don't think a 1/4 lb of live N is too much and you could go another .35 lb N of slow. I like about .6 lb of N total in my March/April fert/pre-emergent app. with under 1/2 lb quick release.
Coron is what percent slow release and over how much time does it release?
What do you pay for it?
How little water can you use with liquid fert today. Years ago I was down to 1.5 gal of solution/K and I think that was about .5 gal of fert in a 15-x-x??? analysis.