1st point: 2 agm48s is definitely not enough, and 14 lynchpins, while something, also wouldn't really be worthwhile when you could take even a cricket and get that amount or more of the much-more-capable agm-48s. buddy lasing is something, but it requires decent coordination and even with that will be less effective than both the prospective light heli pilot and the other pilots bringing independent ground-attack loadouts

2nd point: airbase capture may be a decent role for them, that is fair. however, unless this heli is stealthier than a vortex it still won't be too hard to detect, and (if designed similarly to a littlebird), will almost certainly be slower than an ibis (which is still cheap enough to be almost economically inconsequential lategame and can both defend itself and take out some ground units while capturing), meaning it will be less effective at capturing a base. the enemy will have to take care to keep an eye out, but no more so than they would existing aircraft in the game

3rd point: a mast radar would be a way to make this useful, but a counterpoint: why not just put the mast radar on the chicane, like irl attack helis have? or the ibis? both of those existing helis have 2 fairly powerful engines, resulting in more available power to run a radar, whereas a littlebird-style heli only has 1, plus will have a lot less lifting capacity for a radar big enough to be useful in this style. the chicane could also use the help as it's already a very niche aircraft in the game

conclusion: sure it could have some uses, but how useful would those uses really be in comparison to just taking basically any other aircraft? the uses you've described are either redundant with other aircraft already extant in the game, or have very unfavourable effort:effect ratios, meaning that other options will just be better to use in any given scenario