Since you have so little time invested it might not hurt to get another type and more money *if*
1) Upgrade time is reasonable
2) You can readily commute to or live in the (only) base
Bonus if you already live there or want to live there.
I wouldn't do it if it's a big QOL hit (ie commute), or if upgrade will be a while. ULCC experience will not make you more competitive for the majors, 121 TPIC will do that and it will probably come faster at a regional.
Also... your opportunities to acquire hot-ticket resume bullets will be better at a regional. Training, union, and check airman slots can go junior at a regional but at any major it's likely to be the purview of crusty old CA's. There are some exceptions; I'm guessing sunny isn't one of them but you might want to see if you can find that out.