Do you have a specific question? It does appear as if the reason given by the employer will result in you collecting UI. Go to google scholar and search out misconduct in UI cases and you'll learn more about it.

You should go to the hearing; if you feel you need a lawyer then you are free to have one .. these can sometimes be done over the phone -- this will minimize your legal fees (which will not be recoverable -- so understand the costs involved).

You won't need your co-workers to testify..it could have been one employee complaining about you. Plus they likely will not testify for obvious reasons.

You're smart not to sign anything upon termination.

Even if you were fired for not getting along ... you still get UI. Misconduct is much more than that.