Is this model good? Definitely in top 5% among Illustrious models here. It lacks some features, but overall result are good in average. Still, I would try to improve it in future.

Euler + simple = more diversity (I prefer this)
Euler Ancestral + simple = more stability (good for upscale)
CFG: 6-10 (depends on samplers/schedulers)

The main biggest component in merge is basic Illustrious 2 model. It's not a simple merge - it was merge by blocks, so it's a lot of work (hundreds of hours of manual testing and merging when results were improved in average). I have generated almost 20 000 images only to test and compare different combinations of weights. Current v1 is 7th version I have. A lot of different models were used in process (mostly close to basic illustrious versions or good universal finetunes).