Cloud storage is the worst way to save secret thing, it's better the passphrase is easy and can be memorize, but you have to have another backups in order to prevent if you failed to remember the phrase.
Saving your wallet seed in cloud storage service and account is not different than storing your bitcoin on online platforms. They are both very bad and dangerous ways of wallet backups.
Reminder: do not keep your money in online accountsI just think why make it difficult to save the seed and passphrase? That will make us need to remember where we keep those things. My approach is to save those things in something that I can monitor. Keeping in 4 locations makes me difficult to watch closely because I need to go to that place and make sure that it is safe.
This practice is sort of seed splitting for your wallet backups. It's not recommended and it is considered as very bad idea for wallet backup.
Bitcoin Q&A: Why is Seed Splitting a Bad Idea?