Now, I enjoyed the battle report and all, but I will just put what I notice about the topic as a whole;
1)Note the fact that the background for the battle report is essentially a campaign rather than a tournament, and thus in more ways than one, you will see that most lists tend to be a little over the top. If this is competitive play, you would not really see lists like those. 3 scoring units without much support is kinda scary for competitive lists especially when two out of three of the scoring units are so vulnerable to incoming fire.
2)Any SW player would attest that the characters are seriously bloated, and generally you try to take the most lean and mean characters around, rather than chunking a whole lot into characters and hope it will fly. Since I do help my friends play their wolves from time to time, I have to agree that the list is somewhat more casual and fun over competitive. Any sane SW player would insist on taking lots of Grey Hunters and putting the Wolf Guards as their pack leader, and pumping in the numbers, unless the character can indeed support the entire army in more ways than one.
3)As VV1D would attest, time spend on the hobby dies not correlate with the capability of the player. I have known people who had been in this hobby for 10 years and they still did not get some things right, especially when some of them decided to come back during the newest edition of the game from 4th or even 3rd edition rules. ON the other hand I have seen people who have played for 8 months and are generally amazing plyers till the top players are paying attention to their potential.
4)Your list on the other hand is somewhat there to kill marines, which it does admirably but against a player who is not really there to compete with you, it tends to be a rather oxymoron state when the army does not have enough to deal with your units.
5)Tau is competitive enough, but the fact still remains that they do need some way to make them more effective in what they do, as most armies out there negated and even surpassed the specialty of the tau. The only way for a Tau player to survive these days is to mech up and hope for the best. Drones form vehicles are kinda stupid right now as they are essentially free KPs for the opponent, thus forcing the FoF to be phased out rather violently and the fact that the Tau vehicle's abundance of str 5 weapons kinda make us rather weak when it comes to aggressive play with our vehicles as they are primary vehicle weaponry, not secondary like in the rules of 4th ed.
So that's what I notice, and generally I believe that Tau can still be played, but not to the extent that we used to enjoy back in the days of 4th edition.