It's a shame, because I think the Liberals' have done a pretty good job this government. Yes, they raised tuition fees, but at the expense of what? Conservative policy the last 5 years have been very diluted and appear pretty tame - I wouldn't be surprised if the Liberals agreed to raise tuition fees at the expense of saving something to do with the health/care and other factors.
In the eyes of the public, they sacrificed any integrity they had for a few years in power. The Tories would have forced any more economic constriction in social service/healthcare area because it would harm their key demographic of voters.
The Lib Dem ministers were shafted into minor roles in Whitehall, with the exception of CST, and their "victories" were just scraps which Cameron didn't really care about. The Conservatives have consistently manipulated/misrepresented and this is only encouraged by civil servants who are trying their best to keep their job. They're lucky that the economy is on an upturn and inflation has remained low.
LDs will be irrelevant for a few decades, if the economy improves UKIP won't even be around next parliament. Wildcard is SNP. Will be an interesting election, but i'll be abroad on election day.