Vowel Harmony Asthetically Pleasing?

I am looking for opinions. Who finds vowel harmony in general to be
asthetically pleasing and what do you think of my sketch? I am working on a
conlang that has vowel harmony as follows:

i[1], e[@] are neutral

í[i], é[e], á[a] are front vowels and can only be in words together or with
the neutral vowels

u[u], o[o], a[A] are back vowels and can only be in words together or with
the neutral vowels

Thanks,
Adam

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