Sure. So unbuffered Coir will lock up CA and Mg and if either the pine fines or the leaf compost are not fully mature those could create issues too. Composts and fines (even the "aged" ones) I find available locally vary in maturity and it seems when demand is higher, the maturity gets lower. Sometimes so low as to be problematic. Given this is year 2 for your mix, I would expect coir cation exchange to have occurred at least to some degree and the composts would have had additional time to mature (though also to break down) - as would your fertilizer augments. So, when I consider your carry-over mix, it seems like a good base; I'd just look to add more nutrient rich organic matter and maybe a balanced fertilizer like your D-T-E. I'm not sure how much of your previous fertilizers are still around, so I'm not sure how much more you'd want to add. As Chewbacca alludes, too much dry fertilizer is a bigger problem than too little, as with too little you can simply augment with a liquid.
The proper percentage of compost in your mix can depend on multiple factors, including climate and the composition of the compost. Summers - at least July and August - can be quite dry here. When I grew in Florida it was the opposite. I like a healthy amount of compost in the mix because I'm not using chemical fertilizers thorough the season and the compost give the plants a steadily available and broad supply of nutrients. Even with a good base I'll still be adding fish fertilizer periodically, especially by the late season. Most of your mix will break down very slowly, but the compost leaf component can easily disappear over the course of a year, so this becomes a focus for replacement.
The way I use earthworm castings and compost tea is before I plant. I keep worms so I have very fresh castings with lots of bacteria life. Castings from the store may be old and dried and loose this benefit. I'll mix them in with the compost in modest amounts to accelerate the process of breaking down the compost for availability. Also, I might brew some ACT and use it to wet the mix initially, then let it sit and age for a couple weeks to a month before I transplant - also, as a kickstart. The tea's not going to do much to help with nutrient deficiencies during the season though, not that it wouldn't provide some other benefits, that's why I'll use fish fertilizer when it appears needed.
I hope this is somewhat helpful. Everyone has their own style to how they grow and mine seems to fit well my location and desire to keep things fairly simple and dependable.
