So I've had a chainspear for 6 months or so, and prior to me having it Japhrimel owned it.
The main issues are 1) ensorcelling only works when swung and not when thrown, unlike other hurling weapons, and 2) when the chainspear is swung, the first and second lines of fight text are on the same line, so it looks ultra wonky.
Also, these items are still capped at 6x enchant, which kind of seems outdated considering the general increasing strength of items on the market and how strong thrown returners in general are in comparison to this.