Good to hear you're getting back in the mix Woof
Pete - Yes, monitoring can only ever be considered a good thing IMO... Mine isn't fancy, but evolved out of raw need. Nearly killed a brand new pair of GC2 thanks to a flaky jumper. Thru monitoring and TLC, I was able to correct the issue and things are well behaved for the most part now... But it wouldn't have been possible without it, and the one set was certainly destined for the circular file if I didn't intervene.
At this point it's probably overkill on some level, but I watch some 7 different graphs that all see things from a [some only slightly] different angle, and even tho I'm only able to see 6V chunks of it rather than individual cells, it's proven very sensitive to imbalances when they show up.
Wouldn't go without it ever again on something where the word "investment" even got brushed.