I am not a Lib Dem but as I have previously said I think that they are at their best at this time of year when they discuss policy and their delegates are given lots of great opportunities for participation.
Where I do believe that they have been mistaken this week (apart from some policies) is the excessively personal way in which they are having a pop at opponents. Here is one example. Here is another response.
Apart from not being pleasant, I do not think that the electorate appreciate this kind of politics.