Jank, casual, focused, optimized and competitive are good descriptions in my opinion. It's large enough to describe the effort that the player put into the deck but it's not so specific as to make someone say "Hey that's not a 6, that's a 7". Plus hearing someone say "I have a competitive deck" gives people the mindset of being prepared for a high level duel against the other player. If i see a
Nekusar the mindrazer at the table and someone says "I optimized this deck", then i'll be under the impression that they do have their
underworld dreams and maybe a
havoc festival (my personal touches to how i run the deck). Now if i see a
Kathril, Aspect Warper on the field and someone says "I'm playing a focused Insect tribal deck", I may not know what to expect outside of some small creatures with multiple keywords but i won't be so determined to take that person out when playing in a pod. Having the words of someone explaining where they are in their deck building process gives other players the ability to do proper threat assessment at the table while at the same time giving people the chance to play their decks out and learn what their decks can do. This way they learn where to improve it instead of getting stomped out at every table they sit down at.