Yeah but sometimes it is a bit much. Gandalf's refrain of EWC and then just water makes most sense in most scenarios. You really don't need any other emergency measures unless you over-limed severely or your compost is too raw in which case it will get ugly and only re-potting will help some.
What LOS has taught me is to put the plant in control. That is the no 1 big lesson I got, and it works. It works so well I am almost getting bored and doing stupid things like over-planting just to stay challenged.
An EWC top dress is gentle, and slowly adds life to the soil as you water it down. The clean water flushes out the nasties, if your soil drains nicely you can go pretty liberal as I have done before with no ill effect. So theory is to get excess dissolved solids and ionized particles out the soil, and allowing the micro herd to be replenished from the top. Root exudates will determine what dominates and the micro herd pulls everything back into place.
Will you please test the runoff's pH after your next water? Try get the 'mid stream' water. Best way is good old litmus paper, use a pipette or match stick to pick up a drop and drop it on the paper. DO NOT touch the paper to the water, you will get a very inaccurate reading as it thins the dye. Always drop onto litmus paper. This is the fastest way to get an indication of what is happening in soil pH. Not totally accurate, but a big difference up or down from the pH of water in indicates an extreme situtation...
Kap at Breedbay has some strong and interesting opinions about pH in organics that might surprise most of you. I will go look for the conversation and quote properly. Kap is a guru. I can't imagine running a room the size him and SHOE do...