I disagree with the spawner core drops. I think this could make spawners too much a part of the game. For example, the Tier 5 core drop would result in you getting 100 cores from 1 spawner. I think the fragment rates are goodish enough though.
I like your additional Kilton suggestions, just I would +250 souls to the enchant books. I think the prices of anything tiered should be linear, not logarithmic. (2 hour sell booster should be 5k, 2 hour hades damage booster should be 5k)
I think the harvester hoe would be cool to have it as a legendary drop, like 50:50 with bone axe.
I do not agree with the orbs.
I do not agree with zulrah. I think they should just spend that time finishing Cerberus. I don't think it's healthy if something that was removed from last season was to come back, even if it's just temporary.
I think ELITE mine would be cool if it had ores in it. Perhaps 5% emerald, 5% diamond, 5% gold, and the rest cobble. This would provide some way to mine for experience as well as provide minerals without being too op.