Honestly the 1.11 is no harder to learn then the first,second and third versions are to learn as a couple other members mentioned, I would update to 1.11 so you are not behind the eight ball, in the learning curve
here is the thing to remember just because there has been several new features added in the 1.11 version does not mean you have to use those features at all but it is nice that the features have been added if you choose to use them, the Legend has had many new features and inhancements added with each update that has been given to us, and each and every one of those added features and enhancements has made huge performance improvements to the Legend.
the 1.11 version what I am finding made my Legend more stable on the ground I detect, which is on the extreme side of mineralization, in the 1.11 version I am now able to push my sensitivity to 26-30 most of the time I am at 27 on the sensitivity where before with versions 1.04,1.05,1.07 and 1.09 i was only able to achieve a sensitivity level of 15-19 most of the time I was at 17, the other thing I have noticed is the TIDs (target IDs) are much more stable in 1.11 version in previous earlier versions the TIDs were all over the place and pretty UN reliable for me, also the tones in 1.11 seem much more stable than in previous versions, another thing that has improved for me with the 1.11 version is the ground balance works much much better than in previous versions
(The GB was always one of my biggest complaints in earlier versions), also the threshold in park,field and beach modes now seems to be working much better in 1.11