Not worth the upgrade over the blessing 2 IMO, they are more similar than different. The general consensus of subjective impressions I gathered is that it's a bit overpriced in today's market. More importantly, if you considered the Dusk already better than the Monarch MK2s, I think you call it a day with harman style tuning and enjoy your Blessings.
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On a side note, most of the kilobuck nonchifi contenders (softears, UM, U64 audio, Audeze) all tend to have lower and "safer" pinna implementations than their chifi competitors, so if you found the Monarchs muffled, you surely will notice the lesser upfrontedness of those iems' tonalities.