1 : Mount Horse Gear : if we could extraction for cronstone or fusion it to get better  horse gear !

2: pet : can just realse the pet to get something in return or extraction it 

since we cant exchange event pet with classic ,premium or limited to get higher grade pet.

I have a different suggestion. As someone who got many pets that some of them are no longer useful to me because I've got better type of pets, I think we should be able to send pets to search for loots in which we get various items like trash items, enhancement materials (including cron stones), etc and a possibility to get rare equipment like Blue ~ Yellow equipment depending on areas where you send pets to. The higher your pet tier, the faster it completes its task. I'll call this content "Expedition Mode".

Luuuuurve @angiel's idea of Expeditions for pets, altough we sort of have that with Workers at nodes I guess? Maybe putting a pet ON a node will buff the output?