But customs like Speed thunder and Fire Wall can help a lot in difficult MU and how you couldn't be tempted with the killing power of Thoron+.If custom moves become standard I honestly might just stay 1111 for Robin, none of her customs are too enticing for me
Also the starter stage list really benefits Robin so finally a good change for us.
About the FE:A, I'm currently in my 2nd playthrough in Hard/Classic and I struggle a little but nothing impossible. I was reconsidering restarting the run in Lunatic with Fem Robin (I like her a lot more compared to Male Robin but still cool). Maybe I want to fight against my luck and mental sanity but I want to try Frederick Emblem. and all the grind for the skills can be worth...