Another problem is the magnetize ability can not target titans.
I suppose the reason for this might be, that it is not intended to prevent the use of titan abilities?
So far Magnetize ist the only Ability rendering the target unable to use abilities I think. (also 1 Magnetize Spamming Dunov could prevent a titan from using abilities all alone, whicht would make a decent loyalist titan counter, but still it's quite alot of weight to maybe the most useful tec cap available)
So if this is a problem has to be seen as soon as more disabling abilities are available.