Could the 'and' be dropped here? I'm not asking if it needs to be dropped, but I've noticed in other examples that adjectives are listed without the joining word "and." It's the same way in English that some nouns and adjectives don't always require the joining word. I'm just wondering if it's that way in Arabic too.
Sometimes it is possible sometimes it's not quite common i'd say. In the example above, I personally don't quite feel it's alright to remove the "and" in the Arabic sentence. Probably it is because that the adjectives here are both "predicative" and not "attributive" (or in English, they follow the verb "to be" and not attached to the noun so to say). Not sure if this is the reason here though but it kind of feels weird to say (jayyid) and (saree3) consecutively without linking the two with (wa: and).