As you foresaw, I disagree
I find it weird that a leader who has shown massive support from the public, who have come in their hundreds of thousands to pay £3 to become affiliate members to support him, he's united the majority of Labour Members to back him (he would have won the leadership contest without the £3 vote - so the 'he only won because of Tories and far-lefts paying £3' is balls).
People are sick with the blatantly false austerity argument, it has failed - or at least failed the majority - and across the world there is a huge, and growing, anti-austerity feeling. See the popularity of candidates across Europe and the US in particular who operate from a anti-austerity platform, offering to give the public more say in politics and it is hugely popular.
Corbyn is anti-austerity and his renationalisation policies are polled to appeal to UKIP supporters. Party membership is growing inspite of the smear campaign against him - indeed over 60,000 people have joined the Labour party recently. More people voted for Corbyn than are members of both the Lib Dems and Conservative parties
combined!
To replace him with another Tory-lite, austerity-lite figure at a time when people are calling out for 1) a true alternative and an anti-establishment figure (see popularity of Bernie Sanders, Corbyn, Trump, Farage, Podemos, Greens in Austria and others) are 2) calling out for an end to Austerity an end to punishing the poor to reward the bankers and millionaires 3) (particularly in the Labour party) want more say in how politics is carried out in their name - Corbyn has promised to enable the CLP to 'de-select' MPs if they aren't working on their constituents behalf.
To go from this to another figure similar to Brown, Milliband, Yvette Cooper, Burnham, Kendall ect - careerist, self-serving politicians who will stand on a Tory-lite platform to appeal to the 25% of the electorate who voted Tory will ignore the huge swarths of the country looking for something different, it'll further alienate the 35% who didn't vote and increase the defection and shrinking of the Labour party we've seen between 1997 and 2015 when Corbyn came in and dramatically reversed the trend. You'll end up with masses of people voting Green, SNP, Plaid, even perhaps Lib Dem (on a pro-EU ticket) as they will over a difference from the interchangeable Blue-Labour/Tory narrative and with an even worse performance than Milliband experienced.
It seems ridiculous to assume that the only way to win an election is to not offer an actual opposition, but to mirror the other parties policies and to appeal to the same voters that vote for your opposition - instead of appealing to the 40 constituencies in Scotland, the people who previously voted Lib Dem in 2010, the people who voted UKIP for independence and may feel they don't need to vote UKIP anymore. Rather than take the Milliband and Harriet Harman approach of either supporting Tory policy or abstaining from it. And never fighting the ridiculous assertion that the global recession was caused by Labour or that austerity would make the country more prosperous!
One last thought before I end this essay/rant (apologies). It is definitely not Corbyn who is splitting this party - he has been voting in by the overwhelming majority of members, he has the support of the overwhelming majority of members, he has the support of the overwhelming majority of CLPs across the country. It is the Blairitie MPs who, since day one have attacked him rather than the Tory party, resigned at key times, staged coup after coup, tried to split the party, and are now trying to tear the party to pieces against the party members wishes, despite Corbyn offering them key positions in the cabinet.
