Ive used Ohlins on the RC and the CBR and been happy both times. Bill uses a Ohlins on the back of his '21 and seems happy.
I had a HRC rear shock rebuilt by K-tech and untill I got used to it it felt very soft. Now its alittle closer to how I like it's much better.
If the shock damping overall is ok then maybe you could try making up some new tie rods, I did this to the '18 when I fitted the HRC F3 rear shock and Wayne has just done it to his too. Try Changing the lever ratio.
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If I have to take the carbs off once more...