XenDesktop Essentials

Short answer, no I don't think it's suitable and you would be better served looking elsewhere, though it really depends on what you are trying to achieve. I think even for some larger companies they would be on the fence on what value this may provide overall.

Longer answer - Azure RemoteApp was the closest Microsoft got to a DaaS type service I believe but it has since been discontinued and closes in August.  Here is Microsoft's list of alternatives that may be of interest as a place to start.  I'd add Amazon WorkSpaces to the list as a candidate as well.

Citrix XenApp Essentials is the natural step up from Azure RemoteApp (Citrix and Microsoft have a long-standing partnership).   Citrix XenApp Essentials is now available from the Azure Marketplace and is billed as the easiest and fastest way to securely deliver Windows apps from Microsoft Azure to any device.  

The FAQ says it's 25 user minimum, which anyone can buy (MS Enterprise Agreements not required) and if you don't have RDS licences already, you add $6.25 per user per month.   It's not that simple though, there are Azure consumption costs for starters plus possible data transfer costs and the setup looks far from simple.  An Azure account with an enterprise agreement plus an Azure subscription is required.

This article goes into it a bit more detail - Citrix makes you an offer you can’t refuse: Virtualization for $12/user/month.

Now looking at XenDesktop Essentials that's something else, with more specific requirements:

"XenDesktop Essentials Service is designed exclusively for Windows 10 Enterprise Current Branch for Business (CBB) virtual desktops hosted on Microsoft Azure. Now available in the Azure Marketplace, XenDesktop Essentials will enable IT organizations who have Windows 10 Enterprise E3/E5 Per User or Windows VDA Per User License, the option to use Azure HUB Client Preview image from Azure gallery to deliver a high-performance Windows 10 Enterprise CBB virtual desktop experience from Azure by leveraging the provisioning, management and secure, remote access experience that only XenDesktop technology can deliver.

This article has more details - Citrix XenDesktop Essentials – all facts listed!