As of December 2018 Gwent is a completely different game from its original form. If you loved the simple and tactical Witcher 3 mini game, that had no business being as good as it was, then you may be hankering for more, well this is not what you are looking for. Though different, this new incarnation of Gwent had its own good point, along with many bad, but it can still be ejoyable for what it is.
The biggest issue that any newcomer faces in modern Gwent is knowing what to tech into. You can very easily waste your starting resources, leaving you with a mish mash of cards that dont work well together and leave you in a position where you cant ever hope to win against anybody but the A.I. This is the games biggest issue, and coupled with a host of reductive efforts where nerfs are used to balance the game, rather than proper rebalances that dont stiffle creativity and leave the meta stale. This all compounds to inhibit the exploration of new tactics by newcomers and veterans, due to inviability of most decks outside the meta.
The issue should have gotten better with more and more added cards, but every few months when I come back to the game I'am astounded by how the game is less and less inviting than it was prior.