I'm going to take these one by one and play a little Devil's Advocate
1) It does not matter to me if fisherman found the bike or if LE was using that as good catch-all so that they didn't have to show their hand.
2) Why would LE release information about this text without needing input from the public? This isn't just about finding Mickey. It's first and foremost about finding her, but IMO and IME they also have to protect the integrity of the investigation for if and when it goes to trial. It's not Lafayette Police Department's fault that this is the way it is. Law Enforcement is typically tight lipped in all cases unless they need the public's assistance.
3) IMO The case seems to be at a standstill because of what I said in #2. LPD is doing their job. We cannot assume that just because we aren't hearing anything that things are "falling apart". I know we all want Mickey home and it's an awful situation. But things like this sometimes take a very long time to come together.
Texas EquuSearch did not "leave the case". They moved on to another case in Mississippi and they will be back if and when there is reason to be. They've laid an excellent foundation of how to search areas and were extremely valuable. Tim Miller cannot stay in one place too long because there are always new cases that are just as deserving of TES resources.
4) How do you know they don't have everything they need? Would you expect them to tell us that if this were the case? I'm not saying that your point isn't ultimately true, but at this point IMO it's unsubstantiated.
5) I am certain that LE is on top of this case. Lest you worry about LPD, the FBI is involved as well. IMO, There is no evidence thus far that they are not doing a standup job. Lack of information on day 14 is not evidence of that fact.
6) How do we know it was a tip? Are we privy to the exact times that TES was using sonar in the water? Obviously there was reason enough for them to use those resources at night. Based on what was going on there, I honestly think they were expecting to find a body.