Never heard of ppl rejecting the DASH other than Damansara perdana folks, in fact connection to DASH is a selling point to denai alam projects even before elmina was launched. DASH still go through damansara perdana despite many objections so I don't think denai alam residents can do anything if SD agree on the link to DASH.

The seven skies school and the semi-D near to the DASH were not built when DASH is proposed, it's just that whether SD willing to let DASH to build an interchange there and earn lesser profit. My guess is both parties can't come to an agreement on that. Even if building a link to DASH now, I think it will cause slow traffic if the road at that area cannot be widen as houses already built at surrounding areas. It will not be like the NKVE-Setia Alam link which is well planned by SP Setia.