No. Zerocoin in it's current state is basically broken technology with most big projects moving away from it completely (For example: Zcoin and Veil are developing brand new protocols to replace Zerocoin).
In regards of Solaris though, we don't see a privacy protocol being as a point of attraction. No one used Zerocoin on XLR since it was activated over a year ago.
Stratis are working on a trustless coin mixer which we may integrate in the future as well, but it's not a priority.
Would you mind point out more details on disadvantages of Zerocoin protocol, please.
In 2017 and the first half of 2018, it seems that privacy and private coins would have been next hot trend in crypto, but with serious control from some nations and local authorities, being a private coin contains lots of risks for project. Therefore, I think the Solaris made good decision by not considering privacy as a main objective of the project. It's better to see how nations react with current privacy coins first.