True, but before they had to try and brute force your passcode on your phone or something. And I think I read where Apple had made even that more difficult because they lengthened the time between unsuccessful attempts. Wouldn't being able to bypass that step altogether and get it directly from Apple's servers be less secure?
Nope. They'd need to brute force it just the same, and it would take even longer, since there is an extra layer of encryption now as well. Apple's servers all have their own encryption (the keys for which are destroyed after the servers are set up - Sounds like a bad action movie but it's actually true), and your data on Apple's servers is also secured with data unique to you, like your Apple ID password (which is more secure than your pin). An entry key may also be made for each device you have's pin, so perhaps if you have enough devices that each have a different passcode, it would weaken the system, yes, but you'd need immensely many devices for that. And even then, if they weren't all using the same number of digits (4, 6 or alphanumeric), it wouldn't make a difference either way. Essentially, it's a very secure system.
And all of the above is based on how iCloud handles other sensitive data. I of course don't know their specific implementation of Messages on iCloud, but taking cues from how they generally secure iCloud, the above would hold true.
[doublepost=1516916852][/doublepost]Don't know if this was there in the older releases, but on iPad, if you hold down on "Books" in the Dock, a Recents menu appears similar to Files.