Excellent point. The option could be there through the Explorer Collection without cheapening the MVCI brand. MVCI city locations should be a cut above the norm, like Custom House or nice hotel suites, not basic hotel rooms.
The Explorer Collection involves a fundamentally different business process. Marriott Vacations Worldwide has to monetize the points it collects from a member by trying to rent out corresponding Marriott vacation Club inventory through Marriott.com or through II Getaways. Then it has to pay money to a third party hotel for a hotel room. That introduces significant "shrinkage."
As a result, a single night in a standard hotel room through through the Explorer Collection typically costs around 1000 points, making it 4000 points for four nights. When you consider the maintenance cost per point (regardless of whether those are owned points or elected points), the math almost never works out.
In comparison, Pulse uses the timeshare buisness model, or at least the asset-light variation on the timeshare model now practiced by Marriott Vacations Worldwide.
I'm getting four nights in a 1-bedroom, 2-bathroom suite at Pulse at The Mayflower for around 1200 points total. The math works out pretty well. (Of course, in both cases, the season and day of the week come play to determine actual point amounts.)
Marriott Vacations Worldwide created its Pulse brand (before the tragic Pulse nightclub shootings in Orlando) to differentiate its urban hotel locations from traditional MVCI properties. On the Pulse logo, "Marriott Vacation Club" is in tiny letters, while "Pulse" is in big letters. Clearly, the idea is to create a different expectation than for traditional MVC properties. You can already consider Pulse to be an option for points usage, "without cheapening the MVCI brand."
I have not yet stayed at the MVC Pulse property in San Diego. That hotel was originally a Marriott Suites hotel (then Sheraton Suites, then Declan Suites). The rooms are all identically-sized "cookie-cutter" 1-bedroom mini-suites (with some double-size suites involving two mini-suites connected through an internal door). That's much better than the Pulse at The Mayflower room described by the OP. The San Diego property won't satisfy somebody who is looking for a beachfront Southern California resort with spacious grounds and sparkling outdoor swimming pools, but it should be better than a standard hotel room, especially once the rooms all have their new interiors.