The only reason to alternate macros and micros is if the macros somehow interfere with uptake of the micros. It's actually possible for the less stable iron supplements to be precipitated out by high phosphate levels -- though I doubt any iron chelate is much bothered by any level of phosphate suitable for a tank. LIkewise, if calcium is high relative to boron, boron uptake is inhibited; ditto magnesium. Ditto some other combinations of nutrients.
The way to see if it matters is to see if it matters. Try one approach, give it a month, and if you think the plants aren't doing as well as they ought, try another approach for a month. I advise being patient and only tweaking one thing at a time in a tank; otherwise you have too many variable changing at once and don't know which one made the difference.
I'm working through this now with my big display tank. (Apologies to those who've heard this story a couple times before
My crypts were going gangbusters, hygrophila and staurogyne and (alas) green brush algae doing well, vals doing okay, swords and Java fern and Java moss slowly deteriorating, and I couldn't get alternanthera or ludwigia to establish. Not sure why. Then I got a bout of ich, during which I turned off half my lights and was changing 25% of my water every day and dosing nutrients to the usual levels in the change water. Along with the fish betting better, the Java ferns and moss and sword started taking off while the vals suffered a bit and the staurogyne melted down. I've been duplicating the ich routine (minus the formaldehyde and malachite green, of course) now for two or three weeks and everything is doing very well; the vals and staurogyne are coming back (I think they didn't like the formaldehyde) and so are the Java ferns and swords.
So now I have to figure out what made the difference: Too much light? (I'm told that's not possible.) Fresh nutrients every day? (Most likely.) Something toxic being removed by the more frequent water changes? (Possible but less likely.) I'm going to have to tweak each of these in turn to see which it is. And I'm going to have to be patient. You need to be patient, too. Ars longa, vita brevis.