Thinking of pre-ordering tho I never even finished 1 & 2 ... if got time to play soon.
If not, wait for .... GOTY edition, included with the two expansion packs ... who knows.

Single player RPG only, right? The Witcher series is single-player only.

Ya, no real grinding needed for easy difficulty, haha ... experience points from main & secondary quests are enuf.
However, some potions such as Killer Whale Potion is needed, to hold longer breath underwater in a quest ... forgot secondary or main quest.
Some bombs are useful, but the fire sign can be used as well.
Finished the game without spending skill points in crafting or in alchemy.

In short, on easy difficulty, can finish the game (Level 35) without grinding/contracts or spending time on crafting.