Are Ohm Walsh's a step up from Martin Login Electro Motion ESL's

A true omni is not an ideal recommendation for that room if the positioning is that close to wall, and because of the corner. The man would have to treat the corner, which could screw up the M/T. It might be a different story if the room could be rearranged and the speakers moved out further. YMMV

How about for a start you not toe in the ML speakers. You’re complaining about how narrow the sweet spot is, but you have them toed in. So, change it and put them parallel to the head wall. Obviously this will open up the center image, but you’ll have perhaps enough size for two to listen. You’re not going to get much out into the room at all with those speakers. You would need a different genre.

I agree with douglas schroeder.

The OP has limited wiggle room, and to really appreciate most speakers, they need room to breath. 4-6 feet out. The OP presumably did the ML "light shining" position regarding the toe in?

I have a pair of Theos(step up from the OP’s) that sound quite good for their small size-Not a Soundlab, Maggie or big ML, but very convincing.

6 feet out from the front wall, 3.5 from the side. Combination of damping/diffusion to taste.

Hey Doug you know the Ohm Walsh are not true Omni right? If they were definitely not in corners. But they are designed to go closer to walls than many. Still I have never landed on a corner placement with my Ohms by choice . Can work but may not be optimal placement for them . In general Ohm Walsh are easy to place for good results but there is always still such a thing as optimal placement if possible in one’s particular case.

Big difference between ohm and ML dispersion being just one. Both are good speakers subject to preference and what works best in each case. So I would be cautious about using the term "a step up". Either might do very well if set up properly. The ohms clearly solve the sweet spot problem though versus ml. Trying to play with toe in or no toe in is a good idea always.

See this diagram that shows dispersion pattern of Ohm Walsh CLS driver and how levels are attenuated in wall facing directions to avoid early reflections and allow placement closer to walls and corners.