I was having same problems as you with the new version. Then I created a new account, totally afresh. No incompletes, & a reasonable no. of shares & there was no VM issue. Try it yourself. It was only on one occasion when I accidentally pushed shares up to 10,000 the VM got a little high but not as severe as in the normal account. (I added an external drive but forgot I usually only share selected folders from that drive ... iTunes library.)

On some people's systems this issue is worse than others. So it's more of a particular system issue believe it or not. As suggested, when I opened a new fresh account & used LW there, then there were no problems.