[vintermann]

You don't have to make a perfect pronunciation system. It's OK if a vowel is pronounced slightly differently, as long as its pronunciation can be predicted from context. Even if it can only be predicted 99% of the time.

Insisting that the writing system captures every little distinction is a common mistake enterprising linguists do (often when designing an alphabet for a bible translation, or "modernizing" the spelling of a language which is not their own). They don't have to. Even if you do it, it won't last long. Letters only have to be a reasonably consistent shorthand for how things are pronounced. People don't like a ton of markers or, god forbid, digits sprinkled into their writing to specify a detailed pronunciation.

English has accumulated inconsistencies for so long, though, that it can't really be said to be consistent anymore. Usually, there are radicals who just cut through and start writing more sensibly here and there (without digits or quirky phonetical markers), cutting down on the worst excesses of inconsistency. But in English, these radicals have been soundly defeated in prestige by conservative writers.

[Tagbert]

Agreed. We don’t need an IPA level alignment between writing and pronunciation and you never have a workable single system that rejected all speakers.

I do think we could have a “lite touch” reform that cleaned up some of the more egregious cases like “…ough” and some others that trip people up all the time.