Hi,
I have a Babylock Elegante2 and I use Emb. Library designs all the time and have never had any trouble with them at all.
I do have Density Works, but seldom use it on Emb Library designs, but Dakota and Amazing Designs I do.
If you increase the size a big that reduces some of the density in the designs, too.
I just use a medium weight cut away or a tear away on my embroidery, depending on design and fabric.
Good luck!
Bev