LSP4E 0.2.0 aims at providing more LSP features in the Eclipse IDE and improve integration of those features in the Eclipse IDE.
No security issue known.
Eclipse LSP4E 0.2.0 didn't contribute major usability change. Most of the UX is done by Eclipse Platform UI that renders LSP4E content in already existing and established UI.
Some incubating APIs from previous Incubation releases 0.1.0 has been removed or replaced. As those were incubating, no documentation was kept.
LSP4E 0.2.0 consumes language servers as specified by the Language Server Protocol v3. It relies on LSP4J 0.2.0 to provide compatibility with this standard.