Thankfully, you actually want Karmic Guide to die a lot, because you really want to put it on the battlefield as many times as you can
BT17-090 R Tamer Tomonori Ryusenji Color Purple Cost 3 Type Abadin Electronics Card Text 1 [Effect] [Your Turn] When an effect places a Tamer card in one of your Digimon's digivolution cards, by suspending this Tamer, gain 1 memory
While you technically only need two of each card - as only two of each card can be within a deck and the same cards can be used across multiple decks - you may want to save them up for different Flairs
These Lugia cards might have the best artwork of any card on this list, and the LEGEND card series in general might be on the shortlist for best Pokemon TCG card art of all time
As you pointed out, the difference between Pokmon EX and Pokmon GX is that the former ones are always Basic whereas the latter ones are always the stage they are supposed to be [1] (except for Tag Team GX cards which are also always Basic)
I think it is good for the game and gives people lots of exciting and interesting cards to chase