Perfect Diamond

Perfect Diamond is a vowel system that was considered on the Vowel Ballot.

Proposal
The System was proposed saying: ''One more proposal squeaking in under the radar! I got this idea while looking at Samuel Ahmed's system, and it's got such a neat symmetry to it I just had to share. Seriously look at this vowel system it is so gosh darn beautiful. Close Central ɨ ~ ʉ Mid* e ə o Open Central ä ~ ɒ̈ This is it everyone. This is a vowel system I could seriously stump for. It's not too difficult to pronounce, while still sounding different from from English's strangeness. It's simple - just 5 beautiful vowels, with plenty of diphthong options, but avoids the lazy Spanish-inspired "so perfect it's bland" 5 vowel system that my conlangs have been stuck in forever. It's just the right balance of familiar and strange that I think the best conlangs strike - 3 vowels you're used to, 2 vowels you're not. In terms of technical advantages, it's got very clear contrasts, plus a nice natural "tilt" to it. As with natural languages, it's not a perfectly even distribution - there are blank spaces where vowels are possible, but not realized. However, even those blank spots follow a clear pattern, allowing for flexibility in etymology and dialects if we want to go that route, OR if we wanted unambiguity, it could provide that as well. The rounding pattern is so nice, and allows for lovely phonotactics and allophoney for those who want to get into it... and gives you no trouble if you don't care and just want to say "free variation" and be done with it! :) I feel like I'm nerding out so much, but what the heck I'm already in a sub-group of a conlanging group, so I figure this is a safe space to embrace my weird and actually I love this diamond so much I can't wait to conlang with it!!!! :D Possible orthography: Close Central: y Mid: e u o Open Central: a''
 * the front vowel /e/ is unrounded, mid /ə/ can be unrounded or semi-rounded, and back /o/ is fully rounded