We earned our diamond (therefore elite match) on Royal, mostly great deals on transatlantics, but recently have had way better value on Celebrity.
Our last Royal sailing (Jewel Aug 23) saw around 1100 C&A diamond upwards members onboard, the viking crown was given over to Pinacles (200 ish) which left the D lounge for everyone else, so 900 people in a lounge with circa 36 seats!
Recently off Constellation transatlantic, way more inclusive, lots of elite events, food better (dont get me started on Royal MTD shambles) greater choice of music and entertainers in lounges & theatre compared to Jewel, a similar sized ship. Lots of folks saying Royal has better entertainment, but they need to compare ship size.
Looking ahead, for us to return to Royal it would need to be a destination itinerary, at our price point the older ships are better value but they don't have the quality that Celebrity has.