It's an easy balance for the ocean, not in our tiny systems. Recent research has shown that wild reefs would survive without the nutrients provided by fish (among other things). Population limiters, the oceans volume and millions of years of evolution have set the balance.
Since your coral is healthy, albeit slightly drab, small changes allowed to work over long times are key. Change ONE thing (maybe cut it in half or double it) and evaluate. You're on the cusp of awesome so now it's down to the details.
As for broadcast feeding, while it may (or may not) help accelerate growth, it's not essential to the health of your coral. If you have elevated nutrients causing browning, cut it out. Balanced nutrients is more important than the benefits of broadcast feeding. Target feeding is much more efficient but still not essential.