I agree that you should consider whether the fund fits your usual criteria in decisions about buying, selling or holding.
However, if you already hold it, I think you'll find that 'soft closure' doesn't apply to existing investors, so you can add to your position if you like without worrying about the large initial investment that creates 'soft closure'.
If you like this fund but haven't yet bought it, you have a chance now before it 'soft closes'.