For people new to tabletop RPGs, this is the equivalent of a DLC expansion. It's new content, new rules, new classes, and so forth to augment your 5e game.

Notable contents include:

Racial Traits

1. Racial stat bonuses can be moved around at will (i.e you can change a Half Elf's +2 Charisma to a +2 Strength)

2. Races with negative stat bonuses no longer have negative stat bonuses

3. A new "custom lineage" race exists, which allows to pick any race, and replace their features with a +2 to any stat of your choice, a feat, and darkvision.

Class Variants

These modify class features. Unfortunately, many of them are somewhat controversial in the community because people do not believe that they fixed many of the classes that are considered to have poor design, notably rangers and sorcerers.

For the spellcasters, spell versatility (a feature which allows you to change spells you know on a long rest) was not implemented, disappointing many

New Subclasses

A few subclasses from other books are reprinted so you don't have to buy them (example: Eloquence Bard, from Mythical Odyssey of Theros), and a few are new, like Order Cleric, Wildfire Druid, and so forth.

In particular, the Clockwork Soul Sorcerer is one piece of good news for Sorcerer players.

I've only played for a couple of hours so these really are "impressions".

Positively i'll say its probably PDS's best release. Very few bugs and they are mostly minor that i have seen. There seems to be enough generic and western european content to keep most fans happy, at least for a couple of weeks. I surprisingly like the UI colour and set up. I thought it was a bit modern in the dev diaries but it works well and is less tacky than a thematic scheme might look. The cycling of the map modes on zoom works well. The amount of "meme" is really overplayed on the reddits and marketing, ive only played a few hours but the flavour reminds me of early CK2 rather than late Glitterhoof CK2.

My main negatives at the moment are i find there is often an overwhelming amount of information on screen between the side panels, the alerts tab at the top and how wherever you put your mouse seems to open one or more information popups its a bit cluttered.

I thought the 3D characters would be more memorable than the 2D portraits but i find the opposite. I cant remember any of the characters by image, they all feel very similar. This might be until i am more familiar with the differences though.