Reading this topic, pretty thouroughly, I realise many commenters miss a very important fact : This game is new.
Yes, card games have existed since more than 20 years now, but the way LOTR LCG works is totally unique (and remains the only one in its category).
When you design a whole new game, there obviously will be some flaws and OP interactions that occur and were not intended.
If you've played MtG, you know what I'm talking about when I say Mox, Lotus, Tolarian Academy...
Early mistakes are normal and are being corrected on quaterly basis (more or less), this is more that we can hope for, other designers wouldn't be so active.
When it comes to the topic of bad single card designs, I don't agree Maps and Tomb are badly designed. They don't do the same thing at all and can even work together.
I think of ally Denethor or the new Ship Captain of Pelargir when I think of bad design. In a LCG, unplayable cards are sad since the pool is more restricted than in TCGs and there's no real draft or limited system to give them some kind of use. Iconics characters on very bad cards is even sadder I believe.