KitKat is why, it's much more optimised for devices with lower memory (i.e. 1GB or less), Hudl is running Jelly Bean which doesn't have that optimisation. Apparently we're not gonna get KitKat either so there's probably not much you can do about it.
Couldn't tell you to be honest, I've not really been getting the problems people described, seems smooth enough but you can still tell it's crying out for KitKat which makes this even more annoying :
That was back in January, why is there a dev copy of 4.4 running on a Hudl and we've got nothing, not sure I would entertain buying the Hudl 2 if this is how Tesco are gonna treat their users, the same as any other random Chinese manufacturer.
Just to prove it, I cleaned up the bit where he show the settings screen :
Hopefully that's some kind of rom from FreakTab that'll end up being released.
I haven't actually tried it cos I don't need to install that much to be honest but it's worked in phones I've had in the past so I see no reason why it wouldn't work on the Hudl. You might want to change the partitions on the sdcard to improve the performance though. Here's one guide but there should be tons on YouTube
I got Xposed Framework working on the Hudl and it has loads of plugins which seem to work great. Personally I'm using the GravityBox (JB) plugin and it's working great and has loads of options to customise your Hudl.
There are a lot of people who are doing away with using custom roms and are just using these plugins now as they're a lot simpler, all you need is root.
Here's a couple of videos with more info:
Obviously it would still be great to be able to have a KitKat rom but something tells me Tesco and whoever makes the Hudl for them are concentrating more on the next model than updating this model, which, sadly and annoyingly for Google, seems to be the norm with these manufacturers now.
I would suggest you give the xposed framework route to happiness a go ;)