Should I change my care system?

[AccidentalGreenThumb]

I have three Phals and one oncidium and I have been having great success with all three but lately, with all the reading I've been doing, I have begun to wonder if I am doing ALL that I can be to give my rescues the best care possible. All my plants are in a NE facing window, so they get a lot of nice morning light, but are spared the hotter afternoon sun. They all get approximately 1/2 cup of water a week, I don't use any particular method of measurement, I just eyeball it. All but one (the newest, that hasn't been repotted yet) are in a commercial orchid blend (Black Gold) and the two oldest (my first phal and the oncidium from last year) are definitely going to rebloom this year. The oncidium is actually growing two spikes and I think the phal might be trying to grow another... ANYWAY, long-winded as my post has become, what I want to know is, should I mess with a system that seems to work just fine? Should I be pollinating and feeding them orchid food and fussing over them?