This post is purely focused on the PvE healer support variant of this elite specialization, not the DPS Alacrity one. This is assuming you're using Minstrel's or Plaguedoctor's, or in some cases Giver's (Swapping anything out instead of Plaguedoctor's or Minstrel's impacts the barriers significantly because of the lack of vitality, this is mainly taking into consideration running one of those 2 gear types), with runes such as Monk and transference/concentration sigils. This encompasses pre-patch and post patch issues, the recent follow up post, what improved, and what requires further improvement.
Pre-patch (27th of June), one of the main things going full healer support specter struggled with is boon duration and the lack of certain boons that other strong heal supports grant readily. The main boon it struggled to provide is protection . It also struggled to maintain might for 5 people depending on your boon duration. Besides that, albeit a niche, it has fun and engaging ways of healing such as shadowsteps and using sword 2 to give fast burst heals as well as condition cleanses. Sword can be finnicky for a support due to the back and forth teleporting and stacking in general. Alacrity was not hard to maintain 100% but you did sacrifice a lot of potential utilities because of wells being required.
Post-patch, some of these problems were addressed. Simply making all the scepter skills give 5 target boons/effects enabled a whole new way of giving these. However, the main issue is the "dissipation" of said boon from the main target to those around. While I understand that specter support is meant to maintain a "protect the king" kind of playstyle and that is a part of its identity, this should only apply to the healing and barriers from scepter and shroud skills, not boons as well. Boons on every support are nowadays simple 5 man boons and it's that simplicity that makes them viable at meeting the simple bare minimum of meeting the required boons from a heal support. Even after the change from 2.5 seconds to 4 seconds of protection, this would mean allies around the target would still struggle with the boons you provide from shroud and scepter.
In summary, specter is really cool and despite the healer variant struggling with things such as tanking as a result of losing shroud from damage and a lack of a block, the single target high focus support to an ally, enables it to borderline make anyone tank even someone on a DPS if the specter hyper focuses them with barriers and heals from scepter/pistol 3, and if your subgroup stack well, ideally they should share in those boons from the scepter and shroud, as well as the lesser heals and barriers from those 2, enabling a whole new way of testing fun comps. But for all this to be possible, the boons it applies from scepter and shroud should be the same for the entire 5 man subgroup/party in boon duration, but maintain a higher single target focus in terms of heals and barrier from scepter and shroud.
- Simple suggestion: Please make the boons a specter applies from their specter & shroud simply 5 man equally, covering the entire subgroup they're in, but keep things like barriers and heals from scepter such as Measured Shot dissipating or granting a lesser version to those around the target.
Edit: Forgot to mention how nice it is to free up some wells for utilities, but wells are also good for shadowstep heals and generating shadow force.