I believe that questions have several answers.
If I like the game … yes, although the campaign is boring, pvp is more entertaining.
If I like to spend money to get something … I think no one likes to take out wallet, but this paying by chance is a kind of vice. It’s a vice, really.
Have a completely fused mech, of course! Especially if it´s achieved honestly. It takes so long to fuse a mech … it’s a reward for effort (you feel something special that cheaters will never be able to feel).
To have a mech with all OP, is to have had luck in chance. It’s like going to casino and winning.
The reward in the campaign is very poor. And the campaign is boring (I already said it)