[cs02rm0]

For me it suggested changing specific to specific. And key (as in encryption key) to decisive, vital, key, critical, fundamental or integral.

Then I realised it classified it as average when writing for accountants. So I flicked it over to writing for software engineers and the classification went to fairly effective (39% better than average) and the suggested changes remained the same.

I really like the idea, but the execution seems like it needs some work, at least for the examples I tried too.

[kawin]

Thanks for trying it out! The possible changes you can make stays the same across different cohorts of people, but the score assigned to the word changes (e.g., 'security' has a higher score for retirees than college students). The pinker the word, the higher the score.

Would it be better if only the top 3-4 options were given for each word?

[cs02rm0]

The number of them's fine, it's probably even desirable not to limit it too much and find the suggestions stuck in a local minima. It's the relevance; listing adjectives as alternatives to a noun.

[kawin]

Got it. The system does use a state-of-the-art POS tagger, but I think 'key' was mistakenly tagged as an adjective instead of as a noun for your sentence. I'll try to fix that -- thank for pointing it out!